Skip to main content
Large Mercedes Cars Ultimate Buyer's Guide To Their Line-up

Large Mercedes Cars Ultimate Buyer's Guide To Their Line-up

Right then, you are considering buying a large Mercedes car, but are not sure about your options.

Well, let's have a proper look at the biggest cars Mercedes-Benz has to offer right now, to help you find the right one for you.

However, when we say 'largest', it can mean a few different things, such as: "the longest car for that executive feel", "the tallest and widest for a commanding presence on the road", or "the one with the most seats and space inside for the whole family".

As here, Mercedes has a giant for just about every need, proving that practicality meets refinement across the entire range.

So let us break them down into the main contenders to see which one best suits your needs.

Table of Contents

Black Mercedes-Benz S-Class Saloon

The King of Luxury Saloons, The Mercedes-Benz S-Class

The S-Class has just been that benchmark for luxury cars for decades now.

For instance, it's the car that prime ministers, top executives, and celebrities are often seen driving in.

However, while it might not be the absolute biggest in every dimension, its length and the sheer sense of occasion that it gives you do make it a true giant of the road.

What is it?

A top-of-the-range luxury saloon car.

Why is it one of the largest?

Here, it's all about length.

For instance, the standard S-Class is already a very big car, but the real star is the Long-Wheelbase version.

This model, for example, has an extra section added to the middle of the car, purely for the benefit of your rear-seat passengers, which gives it an enormous amount of legroom - allowing you to stretch out completely.

It’s longer than many SUVs, for instance.

What’s the S Class like inside?

For its internals, you really are getting a very high-end experience here with the latest comfort and technology from Mercedes.

For instance, you get some very plush leather seats that can massage you, massive screens (including the optional 'Hyperscreen' that covers the whole dashboard), and an incredibly quiet and smooth ride as well, creating a truly refined driving experience that is second to none.

It’s clearly been designed to be an office or a relaxation pod on wheels, over just a car.

Who is it Best for?

The S Class is ideal for someone who values the ultimate comfort and technology, and who wants to be driven as often as they drive themselves.

Mercedes-Benz S-Class Saloon Dimensions

Dimension S-Class Saloon (Standard Wheelbase) S-Class Saloon (Long Wheelbase) Mercedes-Maybach S-Class
Length 5,179 mm 5,289 mm 5,469 mm
Width (excluding mirrors) 1,921 mm 1,921 mm 1,921 mm
Width (including mirrors) 2,109 mm 2,109 mm 2,109 mm
Height 1,503 mm 1,503 mm 1,510 mm
Wheelbase 3,106 mm 3,216 mm 3,396 mm
Mercedes-Benz S-Class Interior
Mercedes-Benz CLS Class Exterior

The Style Icon that is the Mercedes-Benz CLS

The Mercedes CLS is a four-door coupé, and you should think of it as taking the sensible E-Class saloon and giving it a much more stylish, sportier, and more dramatic sloping roofline.

It even started the whole 'four-door coupé' trend as well.

Is it one of the largest?

It's a large car, certainly in length, being very similar to an E-Class.

However, its focus isn't on maximum space, as that sloping roof, while looking fantastic, does reduce your rear headroom and makes the boot opening smaller compared to a traditional saloon.

Overall, it's large in footprint and amazing in looks, but not in outright practicality on the whole, really.

What’s it like inside?

It feels sportier and more 'cockpit-like' than a regular saloon does here.

The interior is also very lavish and shares its stunning dashboard and technology with the E-Class, but the lower roof and smaller windows make it feel more intimate and driver-focused here as a result.

Overall, it's a gorgeous place to want to sit.

Who is it Best for?

Someone who loves the look of a sporty two-door coupé but needs the practicality of four doors, as style is the number one priority here.

Mercedes-Benz CLS Coupé Dimensions

Dimension Measurement
Length 4,988 mm
Width (excluding mirrors) 1,890 mm
Width (including mirrors) 2,069 mm
Height 1,435 mm
Wheelbase 2,939 mm

Note: Figures are for the standard CLS model (C257). Dimensions can vary slightly depending on the specific trim level (e.g., AMG Line) and chosen alloy wheels.

Mercedes-Benz CLS Class Interior
Mercedes-Benz G-Class Exterior

The Unmistakable Off-Roader, The Mercedes-Benz G-Class

The G-Class (short for Geländewagen, or 'off-road vehicle') is a legendary, military-derived 4x4.

In fact, it's one of the most recognisable cars on the road thanks to its iconic design, which has remained famously boxy and rugged for over 40 years.

Is it one of the largest?

It does have a massive presence, but its dimensions can be surprising.

For instance, it's very tall and quite wide, which makes it feel huge; however, it's actually shorter than an E-Class saloon, as its size comes from its height and attitude, not its length.

What’s it like inside?

It’s a unique mix of function and luxury, as you sit incredibly high up with a commanding view, and you close the doors with a famous, gun-bolt-like 'clack'.

However, despite its rugged exterior, the modern G-Class is fitted with all the latest Mercedes luxury, including wide screens and plush leather, but it never lets you forget you're in a serious off-road machine, either.

Who is it Best for?

Making a statement here, it’s for those who want an icon that is as comfortable on a London high street, just as it is on a muddy field.

Mercedes-Benz G-Class Dimensions

Dimension Measurement
Length 4,825 mm
Width (excluding mirrors) 1,931 mm
Width (including mirrors) 2,187 mm
Height 1,969 mm
Wheelbase 2,890 mm

Note: Figures are for the standard G-Class model (W463A). The overall length can increase depending on the rear-mounted spare wheel and cover option selected. Height may also vary slightly based on wheel and tyre combination.

Mercedes-Benz G-Class Interior
Mercedes-Benz GLS

The Original 7-Seater SUV, the Mercedes-Benz GL-Class (Now the GLS)

The GL-Class was Mercedes' first full-size, seven-seater luxury SUV, first launched all the way back in 2006.

It was even designed to be the SUV equivalent of the S-Class.

However, this model has now been renamed the GLS, with the 'GL' denoting an SUV and the 'S' showing its link to the S-Class trims.

Is it one of the largest?

It is absolutely, and at the time of its launch, it was the biggest car in the Mercedes lineup, designed to offer you massive space for seven adults and their luggage easily enough.

It was also built with the American market in mind, where big SUVs really are king.

What’s it like inside?

It was all about space, as here you get three proper rows of seats, a huge boot, and a feeling of immense safety and solidity.

The interior was also luxurious for its time, though it has since been surpassed in technology and finish by its successor, the GLS.

Who is it Best for?

The GL model is now only available on the used Mercedes car market.

But, if you want one, you should either consider the newer GLS, or if you can find one on the used market, it’s for a family needing a huge, capable, and safe 7-seater on a more modest budget than a new GLS would require.

Mercedes-Benz GLS Dimensions

Dimension Mercedes-Benz GLS Mercedes-Maybach GLS
Length 5,207 mm 5,208 mm
Width (excluding mirrors) 1,956 mm 2,030 mm
Width (including mirrors) 2,157 mm 2,157 mm
Height 1,823 mm 1,838 mm
Wheelbase 3,135 mm 3,135 mm

Note: Figures are for the standard models (X167). Dimensions can vary slightly depending on the trim line (e.g., AMG Line), wheel size, and optional equipment like running boards. The Maybach version is wider due to its more prominent wheel arches.

Mercedes-Benz GLS Interior
Mercedes-Benz GLB Exterior

The Compact Family SUV, The Mercedes-Benz GLB

The Mercedes GLB is then a compact SUV with a clever trick up its sleeve, as it's available with an optional third row of seats, making it a seven-seater.

It also has a boxier, more traditional SUV shape than its GLC sibling does as well - in case that is something you are looking for.

Is it one of the largest?

In the grand scheme of things, it is one of the smaller SUVs Mercedes makes.

However, it is arguably the largest and most practical car in its class, which is clear to say, as it is a masterclass in packaging, squeezing so much usable space into a relatively small footprint.

What’s it like inside?

On the whole, here you get a very clever interior, as the upright, boxy shape means there's lots of headroom.

Then this is combined well with the fact that the dashboard is modern and packed with the latest Mercedes tech.

The optional third row is then best for children or for occasional adult use on short trips, but it's a brilliant feature to have in a car of this size.

Who is it Best for?

A family that needs the flexibility of seven seats but wants the lower running costs and easier parking of a smaller SUV.

Mercedes-Benz GLB Dimensions

Dimension Measurement
Length 4,634 mm
Width (excluding mirrors) 1,834 mm
Width (including mirrors) 2,020 mm
Height (with roof rails) 1,662 mm
Wheelbase 2,829 mm

Note: Figures are for the standard GLB model (X247). Dimensions, particularly height, can vary slightly depending on the specific trim line (e.g., AMG Line), wheel size, and whether roof rails are fitted.

Mercedes-Benz GLB Interior
Mercedes-Benz GLC Coupe Exterior

The Sporty Mid-Sized SUV, the Mercedes-Benz GLC Coupé & SUV

The GLC is actually Mercedes' best-selling, mid-sized luxury SUV.

Here it has actually been designed to compete with cars like the BMW X3 and Audi Q5.

As a result, it is available in two main trims, the standard GLC SUV for maximum practicality, and the GLC Coupé with a sloping roof for a sportier look.

Are they among the largest?

They sit in the middle of the Mercedes SUV range, and are a very popular size – large enough to feel substantial but practical enough for a whole family. However, they are not so large that they are difficult to manage in town or on country lanes, either, which gives you a good overall balance.

What’s it like inside?

The interior of the GLC is high-tech, beautifully made, and just feels very premium overall.

The standard SUV also has a good passenger space and a large, practical boot as well, while the Coupé version does sacrifice some of the rear headroom and boot space for you to get its more stylish shape.

Who is it Best for?

The GLC SUV is ideal for small families or couples who want a premium, all-round SUV, whereas the GLC Coupé is for those who want to prioritise more of a sporty design in the SUV they buy.

Mercedes-Benz GLC Dimensions

Dimension GLC SUV GLC Coupé
Length 4,716 mm 4,763 mm
Width (excluding mirrors) 1,890 mm 1,890 mm
Width (including mirrors) 2,075 mm 2,075 mm
Height 1,640 mm 1,605 mm
Wheelbase 2,888 mm 2,888 mm

Note: Figures are for the current generation models (X254/C254). Dimensions can vary slightly depending on the specific trim line (e.g., AMG Line) and chosen alloy wheels.

Mercedes-Benz GLC Coupe Interior
Silver Mercedes-Benz GLE

The Do-Everything SUV, Mercedes-Benz GLE (and its predecessor, the M-Class)

What are they?

The Mercedes GLE is a large, premium SUV that sits between the GLC and the giant GLS.

It is also the successor to the very popular M-Class (also known as the ML), which was the first luxury SUV Mercedes ever built back in the 1990s.

The GLE is also available as a standard SUV or a sporty Coupé model, both of which can be equipped with a range of powerful engines that deliver effortless performance.

Are they among the largest?

These are large cars, as the GLE SUV is a very spacious five-seater (with an option for seven) that feels substantial and commanding on the road as a result.

Due to this, it really is a true luxury vehicle with a big footprint, offering you a great blend of space, comfort, and road presence as a result.

What’s it like inside?

Inside, modern GLEs are packed with luxury and technology, featuring large widescreen displays and a very comfortable, high-quality cabin, as well.

Due to this, there is acres of room for your passengers and a massive boot as well, making it an incredibly capable family car due to.

The older M-Class models were also very spacious, though they do come with a lot less advanced technology for today's standard we must note.

Who is it Best for?

Someone who wants a large, luxurious, and highly capable SUV that can do everything from the school run to long-distance touring in absolute comfort.

Mercedes-Benz GLE Dimensions

Dimension GLE SUV GLE Coupé
Length 4,924 mm 4,941 mm
Width (excluding mirrors) 1,947 mm 2,010 mm
Width (including mirrors) 2,157 mm 2,157 mm
Height 1,772 mm 1,730 mm
Wheelbase 2,995 mm 2,935 mm

Note: Figures are for the current generation models (V167/C167). Dimensions can vary slightly depending on the specific trim line (e.g., AMG Line), wheel size, and whether air suspension is fitted.

Mercedes-Benz GLE Interior
Mercedes-Benz V-Class Exterior

The Practical People Movers, the Mercedes-Benz V-Class & Viano

These are Mercedes' van-based premium people carriers, or MPVs.

With the Viano being the previous generation model, which was replaced by the much more modern and luxurious V-Class.

As a result, they really are designed to carry the maximum number of people in more of a car-like comfort style as they do so.

Are they the largest?

In terms of sheer interior volume and the ability to carry people and luggage, these are the biggest passenger vehicles Mercedes makes, bar none.

For instance, they are taller, often longer, and vastly more spacious than even the GLS SUV we should note.

What’s it like inside?

The modern V-Class is actually surprisingly luxurious, with a proper Mercedes car dashboard, high-quality materials, and comfortable, flexible seating for up to eight adults.

As a result, it feels less like a van and more like a luxury limousine with a huge amount of space, all while the older Viano was more functional but still offered incredible practicality at the same time.

Who is it Best for?

It is ideal for large families, executive taxi firms, or anyone whose top priority is moving the most people and their belongings in comfort and style.

Mercedes-Benz V-Class Dimensions

Dimension V-Class (Compact) V-Class (Long) V-Class (Extra-Long)
Length 4,895 mm 5,140 mm 5,370 mm
Width (excluding mirrors) 1,928 mm 1,928 mm 1,928 mm
Width (including mirrors) 2,249 mm 2,249 mm 2,249 mm
Height 1,908 mm 1,907 mm 1,909 mm
Wheelbase 3,200 mm 3,200 mm 3,430 mm

Note: Figures are for the current generation V-Class (W447). Height can vary slightly based on the selected suspension and tyre combination. The Compact and Long versions share a wheelbase, with the Long version having a larger rear overhang for more luggage space. The Extra-Long version has both a longer wheelbase and a longer rear overhang for maximum interior volume.

Mercedes-Benz V-Class Interior

The Ultimate in Luxury, The Mercedes-Maybach Models

For those who find a standard S-Class or GLS a bit... ordinary, there's always a Mercedes Maybach. Think of Mercedes-Maybach as taking the biggest, most luxurious Mercedes models and turning the luxury dial all the way up to eleven.

What are they?

Ultra-luxurious versions of the S-Class and GLS.

Why are they the largest?

They take the long-wheelbase S-Class and the huge GLS and make them even more exclusive.

For instance, here, even the Mercedes-Maybach S-Class is longer than the long-wheelbase S-Class, providing you with palatial space in the back.

This is all while the Mercedes-Maybach GLS keeps the same huge dimensions but focuses on creating an incredible first-class experience for four or five people, rather than cramming in seven.

What’s it like inside?

This is where it gets special, as you should expect two-tone paintwork, enormous alloy wheels, and that famous Maybach grille.

Inside, you'll find 'Executive' rear seats that recline like a business-class airline seat, a champagne fridge with custom-made silver flutes, folding tables, and the very finest wood and leather as well- in fact, it's the definition of automotive excess.

Who is it Best for?

The super-rich. This is not just a car; it's a statement of wealth and a preference for the absolute best of everything.

Mercedes-Maybach S-Class Dimensions

Dimension Measurement
Length 5,469 mm
Width (excluding mirrors) 1,921 mm
Width (including mirrors) 2,109 mm
Height 1,510 mm
Wheelbase 3,396 mm

Note: Figures are for the standard Mercedes-Maybach S-Class Saloon (Z223). These dimensions are significantly larger than the standard Long-Wheelbase S-Class. For special state and ceremonial purposes, an even longer 'Pullman' version exists, which is over 6.5 metres in length.

White Mercedes-Benz EQS Exterior

The Electric Giants, The EQS and EQS SUV

As the world moves to electric, Mercedes has made sure its biggest cars have an electric equivalent as well.

As here the Mercedes EQS and EQS SUV are the flagships of the Mercedes electric 'EQ' range.

What are they?

Here you are getting a large electric luxury saloon (EQS) and a large electric luxury seven-seater SUV (EQS SUV).

Why are they among the largest?

These cars are built on a brand-new electric platform, which allows them to have a very long wheelbase (the distance between the front and back wheels).

This then gives you a massive amount of interior space, and the EQS Saloon is similar in length to the S-Class, and the EQS SUV is the electric counterpart to the mighty GLS

What’s it like inside?

Very futuristic are the words, as here you get the standout feature, which is the optional Hyperscreen - a single piece of glass that stretches across the entire dashboard and houses three separate digital displays.

Because there's no bulky petrol engine as well, the interior just feels incredibly open and airy, all while they are, of course, supremely quiet and smooth.

Who is it Best for?

Here are cars that are ideal for tech-savvy buyers who want the size and luxury of a traditional Mercedes flagship but with zero emissions.

Simple Comparison Table

To make it easier, here’s a quick summary of some of the largest Mercedes cars.

Model Category Roughly How Big? Seats Best For...
S-Class Luxury Saloon Very Long 5 Executive comfort, being driven
GLS Luxury SUV Very Long, Wide & Tall 7 The ultimate luxury family hauler
Maybach S-Class Ultra-Luxury Saloon Extremely Long 4-5 Unmatched rear-seat opulence
Maybach GLS Ultra-Luxury SUV Extremely Wide & Tall 4-5 A private jet for the road
EQS SUV Electric Luxury SUV Very Long & Wide 7 Tech-focused, zero-emission family travel
V-Class Luxury People Carrier Gigantic Up to 8 Maximum people and luggage space

Buying and Financing Your Large Mercedes-Benz

Right, so you've set your heart on one of these magnificent large cars, but, you are thinking how do I go about affording to buy one.

Well, the next step is figuring out the best way to pay for it, as large luxury Mercedes-Benz cars can come with a high price tag.

As an authorised Mercedes dealership, we can help you explore a range of finance options and show you which large Mercedes-Benz models we currently have in stock and available for a test drive.

Here’s a simple breakdown of the most common paths that you can go down to get your hands on one of these cars.

Flexible Finance Packages

Most new and used Mercedes-Benz cars are purchased using finance these days.

So you don't have to pay the full cash price upfront, but instead, you pay for the car in monthly instalments over an agreed period of time.

With popular options here being:

Mercedes-Benz EQS Interior

Personal Contract Purchase (PCP)

Personal Contract Purchase (PCP) is the most common choice.

You should think of it like a long-term rental with the option to buy the car at the end if you so want to.

For instance, here you will typically pay an initial deposit, followed by a series of fixed monthly payments, then, when the agreement ends, you have three choices:

  • A. Pay the final "balloon" payment and own the car outright
  • B. Part-exchange the car for a new one, using any equity you have as a deposit
  • C. Hand the car back with nothing more to pay (subject to mileage and condition)

Hire Purchase (HP)

Hire Purchase (HP), is then is more like a traditional loan.

Here, for instance, you pay a deposit and then finance the rest of the car's value.

Your monthly payments are higher than with PCP, but at the end of the agreement, the car is yours with no large final payment to worry about.

Mercedes-Benz EQS SUV Exterior

The Mercedes-Benz Approved Used Programme

If a brand-new car isn't for you, the Mercedes Approved Used programme is then a fantastic option for you to consider.

As this allows you to buy a second-hand Mercedes with the peace of mind you'd expect from the brand.

For instance, here every Approved Used car comes with:

  • A full mechanical check by trained technicians
  • At least 12 months' unlimited mileage warranty
  • MOT test failure cover
  • A full service history

So Are Large Mercedes Cars Right For You?

So, when you ask for the "largest" Mercedes, the answer really depends on what you need that size for.

For pure, opulent length, it's the Maybach S-Class hands-down, but for the best all-around family-friendly giant, it's the GLS.

Then, for those looking to carry the local football team, it has to be the V-Class.

As you can see, there is simply a large car here for every need, creating a lineup where practicality meets refinement.

If you liked our large Mercedes-Benz Cars review, then you may like some of our other latest news about lease deals, as well as in-depth reviews for both plug-in hybrid cars and mild-hybrid systems reviews, car buying guides and car news to help you find your perfect car.

For example, some of these are, for instance:

Who is Sinclair Group?

Here at the Sinclair Group, we are a prominent family-owned motor retailer based in South Wales with a rich history dating back to 1945. Founded by Bill Sinclair in Port Talbot, our company has grown significantly over the decades.

Today, we operate 25 dealerships representing 12 prestigious automotive brands, including new Audi cars, new BYD cars, new Mercedes-Benz cars, new Land Rover cars to name just some of our 12 car brands, which allow us to offer your some of the most competitive and best prices on new car and used car deals available.

We also employ around 900 staff members, many of whom have been with the Group for over a decade, reflecting our dedication to our employee development and satisfaction as well.

Mercedes-Benz V-Class Boot Space

In other news...

Mercedes-Benz Finance Guide, Compare PCP, HP, and Leasing

Updated: 01 July 2026

Mercedes-Benz Finance Guide, Compare PCP, HP, and Leasing

Confused by Mercedes-Benz finance? Discover how PCP, HP, and Leasing work. Compare interest rates, deposit requirements, and end-of-contract options today.

Find out more
The 2026 Mercedes-Benz EQA Review, 346-Mile Range & 4% BiK Tax Guide

Updated: 11 June 2026

The 2026 Mercedes-Benz EQA Review, 346-Mile Range & 4% BiK Tax Guide

Experience the 2026 Mercedes EQA's 346-mile range, standard heat pump for Welsh winters, and a huge 2026 tax saving. Book your Cardiff or Swansea test drive today.

Find out more
SMART Car Service Guide, A vs B - What Is the Difference and What Does it Cost?

Updated: 11 June 2026

SMART Car Service Guide, A vs B - What Is the Difference and What Does it Cost?

SMART car servicing for Fortwo, Forfour & new electric #1, #3 & #5. Warranty, software updates, battery health checks & more. Book your Service A or B today

Find out more
About Us

Sinclair Group is one of the UKs leading automotive retail groups, delivering exceptional vehicle sales, finance, and aftersales service across Wales and the West of England.

© 2026 Sinclair. All Rights Reserved. Sinclair Group is the brand name for all of our limited companies. Registered in England and Wales. Registered Address: Sinclair Group | Old Field Road | Bocam Park | Pencoed | CF35 5LJ. Registered number: 1192572.

Automotive website provided by Bluesky Interactive Ltd


Vehicles saved to shortlist

You haven't viewed any vehicles yet.

Once you start browsing, your recently viewed vehicles will appear here.

BYD Bridgend: 01656 546092

BYD Cardiff: 02920 035841

BYD Swansea: 01792 002770

Land Rover Aberystwyth: 01970 577404

Land Rover Brecon: 01497 534701

Land Rover Cardiff: 02920 600414

Land Rover Ludlow: 01584 519714

Land Rover Newport: 01633 730605

Land Rover Swansea: 01792 628710

Mercedes Benz: 03304 049961

Mercedes Benz Neyland: 01646 021222

Mercedes Benz Swansea: 01792 002771

Mercedes Benz Bridgend: 01656 339646

Mercedes Benz Cardiff: 02920 032657