How Reliable Is Your Mercedes? Real Claims Data Tells the Story
Mercedes-Benz has long been a symbol of engineering excellence, but even the most robust models are not immune to faults. Over the years, common faults have arisen across a range of models. While recalls and repairs often resolve these quickly, they serve as a reminder that premium vehicles still face wear and component failure. So, let's have a closer look at some of these common faults alongside how they are scored in MotorEasy’s Reliability Index, as of 30th September 2025, which is calculated using real-world claims data from car owners - evaluating repair frequency, average repair costs, and the most common issues:
Even the flagship S-Class has faced corrosion-related brake line problems. Each case shows how unforeseen issues can escalate into costly repairs.
- The A-Class scores an 8.8/10 yet have historically required suspension repairs. In the last twelve months, from MotorEasy claims data, 22% (out of 27) of A-class models have needed Thermostat repairs. This same model has required repair costs as high as £800 due to removal of the dual mass flywheel.
- The C-Class, a UK favourite, scores 6.8/10, though some have faced bonnet latch, fuel filter faults and Nox sensor repairs. With costs as high as £10,800.
- The E-Class rates 5.9/10, with wiring problems under the passenger footwell a known concern.
- The stylish SL-Class earns 6.7/10, reflecting higher repair costs and airbag deployment faults.
- The Sprinter van scores 5.8/10, with problems like oil filler neck leaks and rear axle brake valve faults.
Preventative maintenance such as regular servicing helps reduce risks, but some failures strike without warning and not every issue can be avoided. That’s why a MotorEasy Warranty is invaluable. By covering the cost of unexpected mechanical and electrical breakdowns, you can keep your Mercedes on the road with peace of mind.
