Mercedes-Benz A-Class common faults, MOT red flags & buyer's guide
W176 (2012–2018) & W177 (2018–) · Hatchback
Premium badge with premium bills — inspect and haggle hard.
Mercedes-Benz A-Class common faults
Each fault below is drawn from real owner reports and UK garage patterns for this generation — not generic used-car advice.
7G-DCT dual-clutch gearbox
seriousMercedes' 7-speed DCT can fail — jerky shifts, warning light.
Check for: Any hesitation or clunk on the test drive.
Typical cost: £1,800–£3,500
MBUX infotainment glitches (W177)
minorMBUX can freeze or lose the touchscreen.
Check for: Test all screen inputs and voice control.
Typical cost: Dealer software update
Rear suspension corrosion (W176)
moderateOlder W176 rear axle/arm corrosion.
Check for: Underbody inspection.
Typical cost: £400+ treatment
MOT history red flags
If any of these appear on the last two MOTs, negotiate hard or walk away.
- 'Suspension arm corroded' advisory
Sharp questions to ask the seller
- DCT: any warning lights, ever?
- Full Mercedes or specialist service history?
Got a specific Mercedes-Benz A-Class in mind?
Paste the reg and we'll pull its full MOT history, cross-check against these faults, and tell you: buy, negotiate or walk away.