Skip advert
Advertisement

Mercedes S300 Hybrid review

Diesel-electric hybrid Mercedes S300 luxury limo promises amazing efficiency

Find your Mercedes S-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

It seems Mercedes can’t fail when it comes to the S-Class. With the smaller-capacity diesel and hybrid motor, the S300 is as refined and accomplished as any of its six, eight or 12-cylinder stablemates. If you plan to drive the car yourself, opt for the smoother S350 with the 3.0-litre six-cylinder V6 diesel. If running costs are key, the S300 BlueTEC Hybrid is a fine option.

Advertisement - Article continues below

The new Mercedes S-Class is already a byword for luxury and comfort, and now the S300 BlueTEC Hybrid can add class-leading efficiency to that list.

It’s the second hybrid in the S-Class range, alongside the S400 Hybrid L, and it’s powered by a 201bhp 2.1-litre four-cylinder diesel and a 27bhp electric motor – essentially the same set-up as in the E300 BlueTEC Hybrid. For a car crammed with this much tech and weighing over two tonnes, Mercedes’ claim of 61.4mpg and CO2 emissions of 120g/km is seriously impressive.

The hybrid squeezes out an extra 10mpg over the 3.0-litre V6 diesel S350, but does add eight-tenths to the 0-62mph time, at 7.6 seconds. Yet the car will still whisper up to the same 155mph. In the S300 the normally gruff four-cylinder diesel is more muted, with virtually no intrusion into the cabin. In fact, if you’re gentle with your right foot you can pull away silently on electric power alone.

Considering the size of the S-Class it handles remarkably well, with light but direct steering and the rear-drive set-up giving the agility of a much smaller car.

As a four-cylinder diesel the S300 Hybrid was never going to be as silky smooth as the S350 V6, but it’s still effortless in its delivery. However, with this powertrain the S-Class loses none of its refinement or road manners, and standard air-suspension makes the ride delightfully supple.

Mercedes has cut no corners when designing the cabin, as is demonstrated by the copious use of leather, wood and aluminium – although our car’s £31,000-worth of options do help. The executive rear seat and comfort packs allow passengers to recline up to 37 degrees while enjoying a soothing massage.

The S300 Hybrid commands around a £2,000 premium over the S350, and you’ll sacrifice a little performance. However, the striking improvement in efficiency should still appeal to even the most well heeled buyer.

Skip advert
Advertisement

New & used car deals

Mercedes S Class

Mercedes S Class

RRP £94,185Used from £49,413
Renault Clio

Renault Clio

RRP £16,175Avg. savings £4,231 off RRP*Used from £7,300
Hyundai Tucson

Hyundai Tucson

RRP £29,840Avg. savings £5,573 off RRP*Used from £11,495
Nissan Qashqai

Nissan Qashqai

RRP £27,435Avg. savings £6,600 off RRP*Used from £9,990
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Fancy a cheap used EV? The data says you'd better be quick
Opinion - cheap used EVs

Fancy a cheap used EV? The data says you'd better be quick

A used EV has never had more appeal as the cost of petrol and diesel heads for £2 per litre, says our news editor. But prices are rising, so you’ll ne…
Opinion
24 Sep 2026
New Bentley Torcal revealed: brand's first EV is its most powerful car ever
Bentley Torcal - front action

New Bentley Torcal revealed: brand's first EV is its most powerful car ever

Meet the Torcal SUV, the first all-electric Bentley, claimed to ride like a limo and corner like a coupe
News
24 Sep 2026
New BMW iX3 40 M Sport 2026 review: entry-level SUV isn't a compromise
New BMW iX3 40 M Sport - front tracking

New BMW iX3 40 M Sport 2026 review: entry-level SUV isn't a compromise

Practical, efficient and much cheaper than the xDrive50, we think the base-level BMW iX3 40 is the pick-of-the-range.
Road tests
24 Sep 2026