Skip advert
Advertisement

Mercedes E400 Cabriolet

We drive the new range-topping Mercedes E-Class Cabriolet, ahead of its UK arrival in October

Find your Mercedes E-Class
Compare deals from trusted partners on this car and previous models.
Or are you looking to sell your car?
Value my car
Fast, no-nonsense car selling
Value my car

Mercedes has focused on all the right areas for this facelift. The E-Class Cabriolet was already one of the most comfortable and relaxing convertibles out there, and now it has been improved in all the ways it had begun to lag behind the competition. The updated styling makes it look completely fresh, while the new technology and a few updated engines improve its safety, ease-of-use and performance. One of the best four-seater cabriolets on the market has just got a little better.

Advertisement - Article continues below

The Mercedes E-Class Cabriolet has been facelifted, borrowing some of the updates from the recently tweaked saloon and estate variants. There’s also a new E400 variant, which replaces the E500 at the top of the UK line-up, and Auto Express has been behind the wheel.

The changes are already familiar from the more traditional members of the E-Class family, such as the more cohesive headlight design, the new single-bar grille and the LED rear lights. Importantly, the pontoon-style rear wheelarches remain, whereas they had been smoothed out for the saloon and estate.

The interior tweaks are even more subtle, with the gear selector moving from the centre console to a steering wheel-mounted stalk, some new brushed metal finishes and updated dials.

Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

Used - available now

Focus

2016 Ford

Focus

99,730 milesManualDiesel1.5L

Cash £4,795
View Focus
3 Series

2026 BMW

3 Series

46,380 milesAutomaticPetrol2.0L

Cash £24,195
View 3 Series
C-HR

2018 Toyota

C-HR

67,230 milesAutomaticPetrol1.8L

Cash £13,495
View C-HR
A4

2023 Audi

A4

48,310 milesAutomaticPetrol2.0L

Cash £14,995
View A4

The Cabriolet’s top-down credentials are now better than ever thanks to the automatic AirCap, which drivers used to have to raise and lower manually. Now it’ll go up at 25mph, and almost completely stops buffeting even when you're driving at 60mph.

This new 328bhp engine is fantastic, too, although the big seller is still expected to be the E350 CDI V6 diesel. The E400 may be a tenth of a second slower from 0-62mph (with a time of 5.3 seconds) but it genuinely feels every bit as quick as the E500 it replaces. It delivers power just as consistently, too, despite the fact it’s turbocharged rather than naturally-aspirated.

Advertisement - Article continues below

That means good news for running costs, which have now improved from 31.0mpg in the E500 to 35.8mpg, with CO2 emissions down from 213g/km to 185g/km.

It’s also an engine that fits with the E-Class Cabriolet’s character as a relaxed cruiser. It’s quiet and smooth, which helps complement the smooth ride and top-notch refinement but – as ever with this car – driving thrills aren’t top of the list.

There have been big changes to the amount of technology on offer, with a new Distronic Plus system able to steer, accelerate and brake you through traffic jams and a 360-degree camera to help parking. As standard there’s a Pre-Safe Plus system that can detect a rear end collision and apply the brakes hard to stop you ricocheting in to the car in front.

The new E-Class Cabriolet is available in two trim levels: SE and AMG Sport. Going for an entry-level SE model will cost an extra £2,095 over the old car, while going for AMG Sport means paying £2,435 more than you would have done for the old Sport model.

Those premiums may seem like a lot but Mercedes claims you get extra standard kit in the facelifted car, which actually adds up to more than the premium you’re paying. With that in mind, if you’re after one of the most comfortable, refined and hi-tech cabriolets on the market, then the E-Class is better than ever.

Skip advert
Advertisement

New & used car deals

Vauxhall Corsa

Vauxhall Corsa

RRP £19,870Avg. savings £5,842 off RRP*Used from £9,749
Volkswagen Tiguan

Volkswagen Tiguan

RRP £37,020Avg. savings £3,308 off RRP*Used from £22,000
Dacia Spring

Dacia Spring

RRP £11,990Avg. savings £703 off RRP*Used from £12,550
Skoda Kodiaq

Skoda Kodiaq

RRP £39,390Avg. savings £4,413 off RRP*Used from £25,197
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

New Citroen 2CV: retro-futuristic concept previews £13k EV
Citroen 2CV Concept

New Citroen 2CV: retro-futuristic concept previews £13k EV

A reboot of the 2CV has been on the cards for years, but only now are conditions right for it to prosper
News
12 Oct 2026
New Volkswagen ID. Tiguan revealed: first look at the ID.4's replacement
New Volkswagen ID. Tiguan - front static with Auto Express senior news reporter Alastair Crooks stood next to the car

New Volkswagen ID. Tiguan revealed: first look at the ID.4's replacement

Along with a revamped exterior, the ID. Tiguan brings a host of cabin upgrades too
News
9 Oct 2026
With diesel prices at almost £11 per gallon, the Gov must lower the VAT rate at the pumps
Rutherford fuel prices

With diesel prices at almost £11 per gallon, the Gov must lower the VAT rate at the pumps

Mike Rutherford reckons it’s time for No.10 to step in and admit that the taxes it imposes fuel are now unreasonably high
Opinion
11 Oct 2026