Mercedes-Benz produces some of the most engineered vehicles on the road but at the cost of complexity and out-of-warranty repair bills. The M272/M273 V6/V8 balance shaft / timing chain issue (2004-2008) burned a generation of owners. AIRMATIC air suspension failure on E/S/GL/ML class is universal past 100K. The 9G-Tronic 9-speed has had software issues. The M276 V6 (2012-2017) had timing chain rattle and oil leaks. Modern engines (M256, M254) are too new to fully judge.
Mercedes typically lands in the bottom half of J.D. Power's dependability ranking. Consumer Reports cites high repair costs and electronic complexity.
Mature 9-speed; avoid air suspension trim if longevity matters.
Best-selling Mercedes for a reason. Steel suspension; manageable repairs.
Newer 4-cyl turbo; fewer M276 V6 timing issues.
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Balance shaft gear / timing chain failure - $5,000+ engine job. Class action settled.
Timing chain rattle, oil cooler leaks, intake manifold runner failure.
Air suspension struts $1,500-$2,500 each, often fail by 100K.
M272/M273 balance shaft (2004-2008), M276 timing chain and oil cooler leaks, AIRMATIC air suspension failure, 7G-Tronic conductor plate ("13-pin connector"), and COMAND/MBUX glitches.
Average $908/year per RepairPal. Out-of-warranty AIRMATIC and electronics push real-world cost higher. CPO warranty strongly recommended.
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Build quality is excellent, mechanical reliability below average. Expect more frequent repairs than a Lexus or Toyota.
The 2004-2008 M272 V6 / M273 V8 had a balance shaft gear made from softer-than-spec steel, wearing out and throwing timing codes. Settled in class action.
Yes, about $908/year average per RepairPal. AIRMATIC air suspension alone can cost $5K+ to repair fully.
GLC 300 with steel suspension and the M274/M254 turbo 4-cyl. C300 is similar.
Only with a CPO extension or a strong third-party warranty. Stick with steel-suspension trims.
About the same. BMW has more powertrain issues; Mercedes has more electronics and suspension issues.