"Is the A Serisi A150 reliable, and what should you check?"
The most commonly reported issue when buying a used Mercedes-Benz A-Class A150 2009 (169 / facelift): Throttle body clogging / throttle position sensor. Also, fuel pump / relay failure is frequently reported.
Engine: M266
M266.920 · turbo petrol · A150 · Used in this car from 2004-2009
Known engine issues
Poor fuel quality intoleranceThe engine does not tolerate low-quality fuel, leading to rapid contamination of injectors and throttle body.
Injector and throttle contaminationPoor fuel causes rapid fouling of injectors and throttle body.
Oil leaks and fuel pump failureCommon complaints on forums include oil leaks and in-tank fuel pump failure.
+2 more issues on the engine detail page
Known issues and risks
Listed from most frequently reported, each with its source.
Throttle body clogging / throttle position sensor
Often reported
Many W169 A150 owners report carbon buildup in the throttle body, causing idle fluctuation, stalling when releasing the accelerator, and the check engine light coming on.
Engine Bay
Fuel pump / relay failure
Often reported
Repeated reports on Italian forums indicate intermittent failures of the fuel pump or relay in the A150 (W169). Typical symptoms include difficulty starting after short stops, sudden stalling, and random restarting after a few minutes.
Fuel System
Fuel pump / in-tank filter
Often reported
The in-tank fuel pump assembly may not draw fuel properly in certain positions (e.g., when parked on an incline), leading to hard starting or stalling.
Fuel System
Mercedes-Benz A Serisi A150 technical specs
Mercedes-Benz A Serisi A150 (2009): boot 435 L; fuel use 6,2 l/100 km (urban 7,9 l/100 km · extra-urban 5,4 l/100 km); 0–100 in 12.6 s.
Boot capacity
435 L
Fuel consumption
6,2 l/100 km (urban 7,9 l/100 km · extra-urban 5,4 l/100 km)
0–100 km/h
12.6 s
Top speed
175 km/s
Tire size
185/65 R15
Fuel tank
54 L
Dimensions (L×W×H)
3838 × 1764 × 1593 mm
Same trim, different year
2009
Frequently asked questions
What should I look for when buying a Mercedes-Benz A-Class A150?+
When buying a 2009 A150, check the service history, test drive, and look for engine/transmission warnings. Most commonly reported issues: Throttle body clogging / throttle position sensor; Fuel pump / relay failure; Fuel pump / in-tank filter.
What are the chronic problems of the Mercedes-Benz A-Class A150?+
Most commonly reported issues: Throttle body clogging / throttle position sensor; Fuel pump / relay failure; Fuel pump / in-tank filter.
Is the Mercedes-Benz A-Class A150 reliable?+
Rather than a simple yes or no, it's best to weigh the proven pros and cons together. This page lists 3 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from the Difetti fault database; the source vehicle is verified for brand, fuel, engine, and generation compatibility with the target vehicle. Topics with insufficient evidence are not shown.
We only publish claims we can verify. Cards come from Difetti fault records matched to this vehicle on brand, fuel, engine and generation.
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