My 2021 Mercedes-Benz A220 (M260 2.0L engine) triggered diagnostic fault code P052E, indicating a failure of the Positive Crankcase Ventilation (PCV) regulator valve / intake line assembly. Failure of this valve disrupts crankcase pressure, causing unmetered air intake, lean-running conditions, and engine hesitation/stalling risks. Mercedes-Benz issued a 15-year/150,000-mile extended warranty campaign for this exact PCV failure on M274 engines, but has excluded M260 engines despite identical failure modes. The manufacturer has not remedied this known design defect, creating potential drivability and engine pressure hazards.
The worst 2021 Mercedes-Benz A 220 4matic problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine1
Problems by type
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- Engine1
Recalls 1
Latches/locks/linkages: doors: lock
- What is wrong
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 CLA, 2019-2022 A-Class, 2022-2023 C-Class, 2024 CLE, 2020-2026 GLA/GLB, and 2023-2024 GLC vehicles. Please refer to MBUSA's recall report for specific model information. The micro-switch in the driver's door lock may corrode and fail to detect an open door, preventing the electronic parking brake or "Auto-Park" feature from engaging automatically. This may result in a vehicle rollaway.
- Risk
- A vehicle rollaway increases the risk of a crash or injury.
- Remedy
- Dealers will replace the driver's door lock, free of charge. Owner notification letters are expected to be mailed September 18, 2026. This will be a phased campaign, with the remedy becoming available in different phases based on model and model years. Owners may contact MBUSA customer service at 1‑800‑367‑6372. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning July 31, 2026.
Recall number 26V481000 · Recall details
Technical service bulletins for the 2021 Mercedes-Benz A 220 4matic 55
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz...
- Fuel/propulsion system
- Slight creaking noises when steering
- Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is...
- Radio station cover art does not refresh when switching stations
- Clanking noise from the area of the speakers in the doors
- Intermittent shift feel or thud/clunk noise perceived, such as a brief jerk or transmission reaction...
- Customers may report one or more of the following: • Transmission malfunction message • Check engine light...
- Tailgate opens unintentionally
- The following most common complaints may be observed: • Brief connectivity interruptions when using Apple...
See all 55 bulletins for the 2021 Mercedes-Benz A 220 4matic
What 2021 Mercedes-Benz A 220 4matic owners say
Most recent owner complaints, unedited.
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Questions about the 2021 Mercedes-Benz A 220 4matic
Is the 2021 Mercedes-Benz A 220 4matic reliable?
Owners have filed 1 complaint about the 2021 Mercedes-Benz A 220 4matic, close to a typical A 220 4matic model year.
What is the most common problem with the 2021 Mercedes-Benz A 220 4matic?
Engine and cooling, with 1 complaint.
How many recalls does the 2021 Mercedes-Benz A 220 4matic have?
1 recall, covering latches/locks/linkages.
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