Used Car Checklists

2021 Mercedes-Benz A-Class: What to check before buying

Owners have filed 11 complaints with NHTSA about this car, most about the electrical and transmission. The 7 checks below target those problems, in the order you would do them at the car.

Mercedes-Benz A-Class2021
Owner complaints
11
Recalls
13
Crashes reported
1
1 injury
Reliability
Mixed
58/100 on Auto Reliability Index

Run the VIN before you go

A history report shows accidents, title brands, odometer readings, and open recalls for this 2021 Mercedes-Benz A-Class. Ask the seller for the VIN; it is also on the dash at the base of the windshield.

Your inspection sheet

Tick items off on your phone at the car, or print it. Ticks stay on this device.

These checks are specific to this model year. For tires, body panels, fluids, and the other basics every used car needs, use the general inspection guide.

Reported on other A-Class years with the same design

These years share the 2021's design and most of its parts, so their problems are the ones to look for on this car too.

2020 A-Class

18 owner complaints
  • Electrical 6
  • Transmission 3
  • Engine 2

Worth adding to your 2021 checks

  • Run the VIN through federal recall records and get dealer proof that every open recall repair is done.
  • Shift into reverse several times and confirm the rear camera image appears and stays on.
  • Have a shop scan for stored transmission, coolant, and engine fault codes before you buy.
Open the 2020 checklist

2019 A-Class

42 owner complaints
  • Electrical 10
  • Engine 5
  • Fuel system 5

Worth adding to your 2021 checks

  • Start the car and confirm both the instrument cluster and center screen light up and stay on.
  • Shift into reverse and confirm the rear camera image is not mirrored left to right.
  • Run the VIN through federal recall records and ask the dealer whether parts are available for any open recall.
Open the 2019 checklist

Why these checks: what owners reported

NHTSA complaints for the 2021 Mercedes-Benz A-Class, grouped by the part owners named. Open a row to read what goes wrong.

  • Electrical4No crashes

    The rearview camera screen goes blank while reversing, with no warning light, so the driver loses the backup view. One report puts this at about 10,000 miles. Most filings, though, are about waiting for a recall repair rather than new failures. Owners say the part is not available, dealers put them on waiting lists, and the manufacturer gives no time frame for a fix delivered as an over-the-air update. Several owners say the wait has gone on too long. One filing concerns a different Mercedes model.

  • Transmission2No crashes

    The car loses drive while moving. The reports describe two forms. In one, the accelerator stops responding and the car will not move forward or in reverse. In the other, the engine shuts off without warning, gives off a strong mechanical smell and ticking noises, and shows dashboard alerts. The car then cannot be restarted or shifted into neutral. Both happen in traffic, which leaves the car stranded and at risk of being hit. Failures come back on separate days, and a dealer blamed one case on software and updated it.

How the 2021 compares with other A-Class years

Complaints for this year next to the average for the other model years, area by area.

The 2021 ranks fifth for owner complaints among 6 A-Class years, well under the average of the others. Newer years have had less time to collect complaints, so compare like with like.

2021 Average of other years
  • Electrical46
  • Transmission23

Where the 2021 fits in the A-Class's history

Redesigns and mid-cycle updates change what can go wrong.

The 2021 is the third model year of the A-Class's fourth generation (2019–2023).

Recalls to confirm (13)

Recall repairs are free at any Mercedes-Benz dealer, but the seller may never have had them done. Check each campaign number against the VIN.

  1. 24V445000ElectricalJun 2024

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2021 CLS 53 4MATIC, 2019-2023 E 53 4MATIC Cabriolet, E 53 4MATIC Coupe, E 53 4MATIC Sedan, 2021-2024 GT 43 4MATIC, and 2019-2025 GT 53 4MATIC vehicles. The transmission wiring harness connection might not have been correctly wired during a prior recall repair, and during production. which can expose the electrical connector to corrosion, and result in an electrical short-circuit.

    Risk: An electrical short circuit can increase the risk of a fire.

    Fix: Dealers will replace the two-part wiring harness and connector, free of charge. Interim letters, notifying owners of the safety risk, were mailed August 9, 2024. A second notice will be sent once the final remedy is available. Owners may contact MBUSA customer service at 1-877-496-3691. MBUSA's number for this recall is 2024100002/3. This recall supersedes recall 22V-533. Vehicles repaired under the prior recall will still need to have the new remedy performed.

  2. 24V100000ElectricalFeb 2024

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 CLS450, E450, E450 All-Terrain, AMG E53, AMG GT43, AMG GT53, and 2021 AMG CLS53 vehicles. The 48-volt ground cable connection located in the engine compartment may not be tightened properly and may result in the ground cable overheating.

    Risk: An overheated ground cable increases the risk of a fire.

    Fix: Dealers will inspect the 48-volt ground cable connection and repair it as necessary, free of charge. Owner notification letters were mailed March 22, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024MMNNNN.

  3. 23V880000Fuel systemDec 2023

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2024 GLE, GLS, C-Class, E-Class, S-Class, SL, GLC, CLS, AMG GT, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, causing a loss of drive power.

    Risk: A loss of drive power can increase the risk of a crash.

    Fix: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 28, 2024. Owner notification letters will be mailed in phases, on February 23, 2024, April 19, 2024, June 28, 2024, August 9, 2024, October 1, 2024, and December 2, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 23V-445.

  4. 22V533000ElectricalJul 2022

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2022 AMG GT43, 2019-2022 AMG E53, E53 Coupe, E53 Cabriolet, AMG GT53, and 2019-2021 AMG CLS53 vehicles. The transmission wiring harness may be misrouted, which can expose the electrical connector to corrosion, and result in an electrical short-circuit.

    Risk: An electrical short-circuit can increase the risk of a fire.

    Fix: Dealers will inspect and repair the electrical connector, as necessary. Dealers will also reroute the harness and install an additional bracket. All repairs will be performed free of charge. Owner notification letters were mailed October 14, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022080010.

  5. 22V365000ElectricalMay 2022

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.

    Risk: A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.

    Fix: The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.

  6. 22V042000Stability controlJan 2022

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 AMG GT Black Series vehicles. The wiring harness for the front wheel speed sensor may be the incorrect length, which could result in damage to the harness during certain driving conditions.

    Risk: A damaged speed sensor wiring harness can impair dynamic control functions, such as stability and traction control, and anti-lock brakes, increasing the risk of a crash.

    Fix: Dealers will replace the wiring harness, free of charge. Owner notification letters were mailed March 18, 2022. Owners may contact MBUSA customer service at 1-800-367-6372.

  7. 21V527000AirbagsJul 2021

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 CLS450, AMG E53, AMG CLS53, E350, E450, AMG GT43, AMG GT53, 2020 S450, S560, G550, AMG GLC63, 2020-2021 GLC300, and AMG G63 vehicles. The side crash sensor connectors may come loose, which could delay the activation of air bags and seatbelts during a side impact crash.

    Risk: Air bags and seatbelts that don't function as intended can increase the risk of injury during a crash.

    Fix: Dealers will inspect and replace as necessary, the side impact crash sensors, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021070032/33.

  8. 21V483000Seat beltsJun 2021

    Mercedes-Benz, LLC (MBUSA) is recalling certain 2021 G550, AMG G63, E350, E450, AMG CLS53, AMG E53, AMG GT43, AMG GT53, AMG GT63, 2021-2022 CLS450, and AMG E63 vehicles. The rear seat belt automatic locking retractors may deactivate early, which can prevent the child restraint system from securing properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection.".

    Risk: An unsecured child restraint system can increase the risk of injury during a crash.

    Fix: Dealers will inspect, and replace as necessary, the rear seat belt assemblies, free of charge. Owners notified of the voluntary recall campaign by an interim letter on August 13, 2021. A final letter was mailed on September 24, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.

  9. 21V354000Backup cameraMay 2021

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2021 CLA-Class, GLE/GLS-Class, A-Class, E-Class, E-Class Coupe and Convertible, GLA/GLB-Class, GLC-Class, CLS-Class, and AMG GT-Class 4-door Coupe vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The MBUX multimedia system software may cause the display to remain black, or reboot after startup. This could result in the rearview camera image not displaying properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility.".

    Risk: A backup camera that displays a blank image reduces the driver's rear view, increasing the risk of a crash or injury.

    Fix: The multimedia system software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed beginning June 28, 2021. Owners may contact MBUSA customer service at 1-800-367-6373. MBUSA's number for this recall is 2021050012.

  10. 21V230000SeatsApr 2021

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 C-Class, E-Class, E-Class Coupe and Convertible, GLC, CLS, AMG GT 4-door Coupe and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. A faulty electrical contact within the seat position switch may prevent the driver and passenger air bags and seat belt force limiters from properly activating during a crash.

    Risk: Air bags and seat belts that do not perform properly in a crash can increase the risk of injury.

    Fix: MBUSA will notify owners, and dealers will replace the seat position switches, free of charge. Owner letters were mailed May 21, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021040016.

  11. 21V217000ElectricalMar 2021

    Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2018-2021 E63S AMG, E63S AMG Wagon, 2019-2021 AMG GT63 4-door, and AMG GT63S 4-door vehicles. The starter motor positive cable may not have been installed correctly, potentially allowing the power supply harness wires to chafe.

    Risk: Damaged wires may cause a short circuit and result in a vehicle stall, increasing the risk of a crash. Also, a short circuit can increase the risk of a fire.

    Fix: MBUSA will notify owners, and dealers will inspect and, as necessary, correct the screw connections and position of the positive cable, free of charge. Owner letters were mailed May 18, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021040013.

  12. 21V058000ElectricalFeb 2021

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.

    Risk: Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.

    Fix: MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.

  13. 21V034000Child SeatJan 2021

    Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 A220, A35 AMG, and CLA250 vehicles. The child seat anchoring system (ISOFIX) may be missing the right-side anchoring bar from the ISOFIX bracket on the right-rear seat.

    Risk: If the anchoring bar is missing from the ISOFIX bracket, the child restraint cannot be properly secured to the seat using the ISOFIX securing system, increasing the risk of injury for a child in that seat.

    Fix: MBUSA will notify owners, and dealers will inspect the right-rear ISOFIX bracket and replace the bracket, if necessary, free of charge. The recall began March 16, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021020004.

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