Skip advert
Advertisement

Mercedes SLK 350

The original folding hard-top is back - but does the all new Mercedes SLK have the dynamics to match the aggressive looks?

Find your Mercedes SLK
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

It’s easy to be seduced by the 350’s muscular power and that dramatic noise. There’s no question that the SLK is now a serious contender in this class – and a highly polished all-rounder. Yet currently the majority of UK cars sold are 200s, and the new 350 is unlikely to change that. The 250 looks almost exactly the same, costs significantly less to buy and run, and, thanks to its lighter weight, is better to drive too.

Advertisement - Article continues below

Meet Mercedes' mini SLS! The all-new SLK looks more aggressive thanks to AMG supercar-inspired styling – but does it drive like one too? Auto Express got behind the wheel to find out.

We’ve already tested the mid-range four-cylinder petrol, but with a revised 3.5-litre V6 offering more power and better fuel efficiency than the previous car, can the flagship SLK 350 finally deliver the thrilling drive promised by the sharp new looks?

Video: watch CarBuyer's video review of the Mercedes SLK

[[{"type":"media","view_mode":"content_narrow","fid":"68677","attributes":{"alt":"","class":"media-image"}}]]

The new engine is significantly cleaner than the one it replaces, using clean burn technology and direct injection to increase fuel economy to nearly 40mpg - not bad for a car that goes from 0-62mph in just 5.6 seconds. Power delivery is linear and smooth, and the tuned exhausts provide an exhilarating soundtrack, particularly with the folding roof stowed.

However the SLK is still far from a raw sports car. Roof up or down, it’s more comfortable and spacious then before, with road and wind noise well suppressed, and even with the suspension in the firmer ‘sport’ setting, it rarely loses composure, which means there’s plenty of grip through corners.

Yet the most powerful car in the line-up (until a V8-powered AMG version arrives next year) can’t quite match the handling poise of the lesser models in the range. The electrically assisted steering is a little lighter, and there’s noticeably more body roll due to the weight of the extra two cylinders. The 7G-Tronic automatic gearbox also lacks the immediacy of the latest dual-clutch systems, and it struggles to make crisp changes when you really up the pace.

The new interior is a revelation though, the jet turbine air vents and aluminium switches are lifted straight from the SLS, and build quality is superb. But at £44,115, the 350 is more expensive than both the Boxster S and BMW Z4, and less sharp to drive than either.

Skip advert
Advertisement

New & used car deals

Vauxhall Corsa

Vauxhall Corsa

RRP £19,870Avg. savings £6,086 off RRP*Used from £9,649
MG MG4

MG MG4

RRP £27,005Avg. savings £6,250 off RRP*Used from £11,000
Nissan Qashqai

Nissan Qashqai

RRP £27,435Avg. savings £5,987 off RRP*Used from £8,995
Skoda Kodiaq

Skoda Kodiaq

RRP £39,045Avg. savings £7,139 off RRP*Used from £10,800
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

New Citroen Berlingo MPV aims to be the perfect SUV antidote
Citroen Berlingo - watermarked

New Citroen Berlingo MPV aims to be the perfect SUV antidote

The new Citroen Berlingo will be simple, spacious and stylish, and our exclusive image previews how it could look
News
15 Jun 2026
New Land Rover Defender Sport: baby SUV hedges bets with EV and hybrid power
New baby Land Rover Defender render - watermarked

New Land Rover Defender Sport: baby SUV hedges bets with EV and hybrid power

The new Land Rover Defender Sport will sit below the existing Defender in both size and price, and our exclusive image previews how it could look
News
17 Jun 2026
New Cupra Formentor VZ5 boasts Audi RS 3 five-cylinder power
Cupra Formentor VZ5 - front

New Cupra Formentor VZ5 boasts Audi RS 3 five-cylinder power

Cupra’s sporty crossover SUV is now available with a 385bhp five-cylinder engine, just for kicks
News
15 Jun 2026