Skip advert
Advertisement

Mercedes S-Class (2014-2020) review - Reliability and safety

With all the options ticked, the S-Class is surely one of the safest cars in the world

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

Mercedes has forged a strong reputation for building durable cars, and this was backed by an impressive 11th place in our Driver Power satisfaction survey in 2015.

More worryingly perhaps, at least as part of a bigger picture, was the manufacturer’s score for reliability alone, which was rumbling along at 26th out of 30-odd contenders. Fast forward to 2018, and Mercedes has improved to 18th place, ahead of BMW but behind main rivals Audi.

Advertisement - Article continues below

It’s the lesser Mercs that seem to be letting the side down, though, so we’d be amazed to hear of anyone picking fault with the build quality of an S-Class.

Euro NCAP hasn't crash tested the sixth-generation S-Class, but we'd be amazed if Merc’s technology flagship failed to do the business if it were put through assessment.

As you’d expect, there's plenty of standard safety kit, including eight airbags, a traffic sign recognition camera, a driver drowsiness monitor and a stability control system which incorporates Curve Dynamic Assist and Crosswind Assist.

The S-Class can also be fitted with the Driving Assistance Package (optional on AMG Line models but standard on the Mercedes-AMG cars), which adds blind spot monitoring, lane keep assist and adaptive cruise control, plus a £2,250 night-vision camera and novel £1,230 rear seatbelts that feature integrated airbags. If you want unbeatable safety – and can afford to pick up the bill – then the big Merc has it covered.

Warranty

The standard Mercedes warranty applies to the S-Class, which means three years cover and no mileage cap.

Servicing

Mercedes’ Service Care pack guarantees the cost of routine maintenance for up to four services. The plan is flexible depending on mileage, but if you drive between 15,000 and 30,000 miles a year Mercedes will cover you for £55 a month – including 4 services over three years. 

If you simply want an annual service once a year for two, three or four years, there’s another monthly plan that costs £41. Either way, it’s not a bad deal considering the price of the car, especially when you consider a three-year deal for the smallest Mercedes A-Class is £32 per month.

Skip advert
Advertisement

Which Is Best

Cheapest

  • Name
    S350d L 313 AMG Line Premium 4dr 9G-Tronic
  • Gearbox type
    Semi-auto
  • RRP
    £100,290
Select car

Most Economical

  • Name
    S450e L AMG Line Premium 4dr 9G-Tronic
  • Gearbox type
    Semi-auto
  • RRP
    £112,145
Select car

Fastest

  • Name
    Maybach First Class S680 4Matic 4dr 9G-Tronic
  • Gearbox type
    Semi-auto
  • RRP
    £224,450
Select car

New & used car deals

Mercedes S Class

Mercedes S Class

RRP £100,390Used from £59,990
Dacia Spring

Dacia Spring

RRP £14,995Avg. savings £4,636 off RRP*
Skoda Kodiaq

Skoda Kodiaq

RRP £39,025Avg. savings £3,517 off RRP*Used from £13,495
Nissan Qashqai

Nissan Qashqai

RRP £27,415Avg. savings £6,056 off RRP*Used from £10,399
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Volvo EX60 2026 preview: extra large range and power for Volvo's medium SUV
Volvo EX60 - front

Volvo EX60 2026 preview: extra large range and power for Volvo's medium SUV

The new all-electric Volvo EX60 has some seriously impressive specs, and prices start from £56,360
News
21 Jan 2026
EV charging gets 10% cheaper and there’s more to come
Rapid charging Fiat 500

EV charging gets 10% cheaper and there’s more to come

Ultra-rapid chargers in December were five pence cheaper than they were in November for off-peak users, with a cut in VAT also on the cards
News
22 Jan 2026
Car Deal of the Day: Comfy Citroen C5 Aircross for a cool £188 a month
Citroen C5 Aircross - full front

Car Deal of the Day: Comfy Citroen C5 Aircross for a cool £188 a month

It may be brand new, but the Citroen C5 Aircross is currently the cheapest mid-sized family SUV on our marketplace. It’s our Deal of the Day for 20 J…
News
20 Jan 2026