2011–2012 Mercedes-Benz S-Class (W221)
Browse our directory of 2011–2012 Mercedes-Benz S-Class (W221) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Common Problems & Reliability
The 2011–2012 Mercedes-Benz S-Class (W221) has 2 known issues. 1 of these are classified as serious faults that could be expensive to repair.
Airmatic / ABC suspension failure
SeriousAir springs leak and compressors wear out. ABC (Active Body Control) hydraulic systems on sport models are even more expensive to repair. Cars sag on one corner and throw suspension warnings.
Symptoms: One corner sits low, Suspension malfunction warning...
Est. repair cost: £800–£3,000
COMAND infotainment glitches
MinorThe COMAND system can develop disc read errors, screen freezing and audio dropouts. Replacement units are very expensive.
Symptoms: Disc read errors, Screen freezing...
Est. repair cost: £200–£800
Buying Tips for the 2011–2012 Mercedes-Benz S-Class (W221)
- ✓Thoroughly test the Airmatic air suspension by raising and lowering the car; leaking struts or a failing compressor are common and expensive to fix.
- ✓On diesel OM642 V6 engines, check for oil leaks around the turbo and oil cooler in the V-valley, which is a labour-intensive and costly repair.
- ✓Check the operation of the 7G-Tronic gearbox; shuddering or harsh downshifts indicate a failing conductor plate inside the transmission.
- ✓Test the central COMAND dial and screen; the rotary controller shaft frequently snaps, making the infotainment system unusable.
- ✓Verify that the radar-guided Distronic cruise control and Blind Spot Assist sensors work, as water ingress often destroys the radar modules in the bumpers.
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