Mercedes-Benz CLS reliability: common problems by model year
Across 9 model years, the Mercedes-Benz CLS has 214 owner-filed NHTSA complaints and 0 recalls on record. The most-reported areas are fuel/propulsion system and service brakes. 2006 drew the most complaints (110), 2020 the fewest (6).
9
Model years tracked
214
Owner complaints
0
Recalls
11
Median per year
Source: NHTSA complaints and recalls filed for Mercedes-Benz CLS vehicles (US, public record). Typical used asking price $16,487–$30,843.
Which CLS years have the most problems?
Complaint volume by model year. Raw NHTSA totals, not adjusted for sales volume or time on the road, so older and higher-selling years accumulate more. Every year links to its full breakdown.
Sentiment is mixed and heavily dependent on the specific generation and powertrain. For the first-generation (C219, ~2005-2010), owners express strong affection for its iconic, beautiful design and the reliability of the M113 V8 engine (in CLS500/CLS55 models)
Air suspension failures: components (bags, pumps) begin to fail at 60,000-80,000 miles, leading to expensive repairs. Frequency: very frequent.
M278 V8 engine cylinder scoring: a known engineering defect in earlier models (pre-2016) causing loss of compression; requires engine rebuild. Frequency: very frequent for affected years.
48V mild hybrid system failures: includes battery and DC/DC converter malfunctions, causing warning lights and electrical issues, particularly on 2019+ CLS450 models. Frequency: very frequent for this generation.
High maintenance costs: routine dealer services (A/B service), brakes, tires, and repairs are cited as significantly more expensive than mainstream brands. Frequency: very frequent.
Engine oil wicking into wiring harnesses: a common issue on M278 and M157 engines, requiring harness replacement or repair. Frequency: recurrent.
Owner insights cover all generations of the CLS. Individual model years are broken down above.