In-depth reviews

Mercedes S-Class saloon - Reliability & safety

The Mercedes S-Class boasts some of the world's most advanced safety features

Mercedes S-Class saloon front 3/4 tracking
Carbuyer Rating

4.5 out of 5

Owners Rating

4.0 out of 5

Read owner reviews
Reliability & safety Rating

4.0 out of 5


  • Incredibly refined
  • Class-leading technology
  • 62-mile electric range for PHEV


  • High running costs
  • Only one petrol engine
  • Expensive to buy

The outgoing S-Class sold in too small numbers to feature in our Driver Power survey, but the Mercedes brand only managed to come in 28th place out of 30 manufacturers in 2020.

Mercedes S-Class reliability

Coming 28th out of 30 manufacturers in 2020 is certainly a disappointing result, with high running costs and expensive maintenance dragged down Mercedes’ score. There are plenty of systems fitted to the S-Class with the potential to malfunction, but for the first time in the model, over-the-air updates should make it possible for software patches to be installed without having to visit the dealership.


There are plenty of reasons to argue the S-Class could be the safest car available to buy. It's absolutely bristling with advanced safety equipment, including eight standard airbags, traffic-sign recognition, driver monitoring and systems that help the chassis deal with corners and crosswinds. The car can also raise by up to 80mm if a side-impact is imminent, helping better protect occupants. 

A Driving Assistance Package is now standard, with features including blind-spot monitoring, lane change assist and evasive steering assist. It also has adaptive brake lights and attention assist to ensure the driver isn't tired or distracted. An emergency call system can alert the emergency services automatically if the car is involved in a serious collision.

Most Popular

Best new car deals 2021
15 Jan 2021

Best new car deals 2021

Car dashboard warning lights: the complete guide
Tips and advice
28 Dec 2020

Car dashboard warning lights: the complete guide

Best small SUVs
Small SUVs
31 Dec 2020

Best small SUVs