UK Reliability Directory

Mercedes-Benz CLS (C218)

Production Years: 2010 - 20183 Documented Faults

The second-generation Mercedes-Benz CLS (C218) is a refined and stylish four-door coupé (and stunning Shooting Brake) that shares most of its reliable mechanical components with the E-Class W212. Positioned to offer the practicality of a saloon with the swooping elegance of a coupe, it commands a premium over the E-Class but holds its value well in the UK market. Overall, it is highly reliable and makes for an exceptional long-distance cruiser. However, diesel emissions hardware, Airmatic suspension on higher trims, and 7G-Tronic gearbox issues are the main watch-outs, making it perfect for style-conscious executives.

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Common Faults & Reliability

These are the most common documented problems for the Mercedes-Benz CLS (C218), sorted by their typical impact and frequency.

NOx sensor and AdBlue system faults

medium severity

BlueTEC diesel models regularly trigger engine lights, limp mode or no-restart countdowns when NOx sensors or AdBlue heaters fail.

Est. repair cost:£400–£1,000

Airmatic air suspension leaks

high severity

Air springs leak and compressors wear out, causing the car to sag on one corner and throw suspension warnings.

Est. repair cost:£800–£2,000

7G-Tronic conductor plate failure

medium severity

The 7-speed automatic gearbox conductor plate can fail, causing harsh shifts, limp mode and gear reading errors.

Est. repair cost:£400–£1,200

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