Mercedes-Benz Recall affects more than 310,000 vehicles in the United States after the automaker identified a defect that could prevent the automatic parking system from engaging. According to documents filed with the National Highway Traffic Safety Administration (NHTSA), the issue could increase the risk of a parked vehicle rolling away under certain conditions.
The Mercedes-Benz Recall covers 310,667 vehicles across seven model lines built between the 2020 and 2026 model years. Mercedes-Benz says the problem is linked to a driver’s door lock microswitch that may corrode over time, preventing the vehicle from detecting when the driver’s door has been opened.
Although the defect does not affect the operation of the door lock itself, it can interfere with safety features designed to automatically secure the vehicle after the driver exits.
The Mercedes-Benz Recall includes several passenger car and SUV models sold in the United States.
The recall includes selected vehicles from the following Mercedes-Benz models:
| Model | Model Years |
|---|---|
| Mercedes-Benz A-Class | 2019–2022 |
| Mercedes-Benz CLA | 2020–2021 |
| Mercedes-Benz C-Class | 2022–2023 |
| Mercedes-Benz CLE | 2024 |
| Mercedes-Benz GLA | 2020–2026 |
| Mercedes-Benz GLB | 2020–2026 |
| Mercedes-Benz GLC | 2023–2024 |
Only certain vehicles produced during these model years are affected. Owners can verify whether their vehicle is included by checking its Vehicle Identification Number (VIN) through Mercedes-Benz or the NHTSA recall database.
What Caused the Mercedes-Benz Recall?
According to recall documents, the issue originates from the driver’s door lock microswitch.
Mercedes-Benz determined that the housing material used for the microswitch may allow moisture to enter over time. Continued exposure to moisture can lead to corrosion inside the switch, eventually causing it to fail.
When the microswitch no longer functions correctly, the vehicle may fail to recognize that the driver’s door has been opened after shifting into Park.
The door lock itself continues to function normally, but the faulty microswitch can interfere with electronic systems that rely on accurate door-status information.
How the Defect Can Increase Rollaway Risk
The defective microswitch primarily affects the operation of the vehicle’s automatic parking functions.
If the driver’s door is opened and the vehicle fails to detect that action, systems such as:
- Auto Park
- Electronic Parking Brake
may not activate automatically as intended.
Without those systems engaging, the vehicle could remain unsecured after the driver exits, increasing the possibility of a rollaway incident.
Mercedes-Benz says the issue only occurs if the microswitch fails due to corrosion and does not affect every recalled vehicle.
Why Modern Vehicles Depend on Door Status Sensors
In today’s vehicles, a driver’s door lock microswitch performs far more functions than simply detecting whether the door is open or closed. The small electronic component communicates continuously with multiple onboard control modules that manage convenience, security, and safety systems.
Depending on the vehicle model, information from the door sensor may be used for features such as automatic locking and unlocking, interior lighting, keyless entry functions, driver assistance systems, and automatic parking features. Because these systems exchange data in real time, an inaccurate door status signal can affect several vehicle functions even if the door itself continues to operate normally.
Mercedes-Benz emphasized that the recalled vehicles remain drivable, but the defective microswitch may prevent certain automated safety features from functioning as intended.
Owners May Notice Warning Signs
Although no injuries or crashes have been linked to the defect, the Mercedes-Benz Recall was launched as a preventive safety measure. Before the microswitch completely fails, some owners may notice unusual behavior involving convenience features.
Mercedes-Benz says possible warning signs include:
- Radio continuing to play after leaving the vehicle
- Certain comfort functions remaining active unexpectedly
- Door status not being detected correctly
- Warning messages related to vehicle electronics
Drivers experiencing these symptoms are encouraged to have their vehicle inspected even before receiving an official recall notice.
Mercedes-Benz Identified the Supplier Issue
Mercedes-Benz traced the problem to a deviation in a supplier’s manufacturing and development process.
According to the recall documents, the housing material used for the driver’s door lock microswitch did not meet the company’s durability standards. As a result, moisture can gradually enter the switch housing, leading to corrosion and eventual failure.
Once Mercedes-Benz confirmed the root cause, the company initiated a voluntary recall to replace the affected components before the defect could result in vehicle rollaway incidents.
How Mercedes-Benz Discovered the Problem
The investigation ultimately led to the Mercedes-Benz Recall, allowing the company to replace the affected components before more vehicles experienced the defect.
Mercedes-Benz said the issue came to light during its ongoing quality monitoring process, which includes analyzing field reports, technical data, and supplier information after vehicles enter service. After engineers identified signs that moisture could enter the driver’s door lock microswitch under certain conditions, the company launched an internal investigation to determine the root cause.
The investigation concluded that the housing material used for the microswitch did not provide the expected long-term protection against moisture intrusion. Once corrosion develops inside the component, the switch may no longer accurately report the driver’s door status to the vehicle’s electronic control systems.
Manufacturers routinely conduct these investigations even when no crashes or injuries have been reported, allowing potential safety defects to be addressed before they result in real-world incidents.
Mercedes-Benz Has Not Reported Any Rollaway Incidents
Despite the potential safety risk, Mercedes-Benz stated that it was not aware of any crashes, injuries, property damage, or confirmed vehicle rollaway incidents related to this defect when the recall was announced.
The recall is intended as a preventive safety measure to eliminate the possibility of the issue occurring in affected vehicles.
How Mercedes-Benz Will Fix the Problem
Repairs related to the Mercedes-Benz Recall will be carried out free of charge at authorized Mercedes-Benz dealerships. Owners of affected vehicles will receive official recall notifications on or before September 18.
Once notified, customers can schedule an appointment with an authorized Mercedes-Benz dealership, where technicians will:
- Inspect the driver’s door lock assembly
- Replace the driver’s door lock microswitch with an updated component
- Perform the repair free of charge
The replacement microswitch uses improved housing materials designed to better resist moisture intrusion and long-term corrosion.
What Owners Should Do Before Their Service Appointment
Owners do not need to stop driving their vehicles solely because of this recall unless they notice symptoms associated with the defect. However, Mercedes-Benz recommends scheduling the free repair as soon as notification letters are received.
Until the repair is completed, drivers should confirm that the vehicle is securely parked before leaving it. Applying the electronic parking brake manually and ensuring the transmission is fully shifted into Park can help reduce the possibility of unintended vehicle movement if automatic systems do not activate.
If owners experience unusual warning messages or notice that convenience features continue operating after exiting the vehicle, they should contact an authorized Mercedes-Benz dealership for inspection without waiting for the recall notice.
How Owners Can Check if Their Vehicle Is Included
Checking your VIN is the quickest way to confirm whether your vehicle is part of the Mercedes-Benz Recall.
Mercedes-Benz owners can determine whether their vehicle is affected by entering their Vehicle Identification Number (VIN) on the official Mercedes-Benz recall website or through the National Highway Traffic Safety Administration (NHTSA) recall lookup tool.
Even if the vehicle appears to operate normally, owners should complete the recall repair if their VIN is included in the affected population.
Safety Recalls Help Address Problems Before They Become Widespread
Vehicle recalls are a routine part of the automotive industry and do not necessarily indicate widespread failures across every affected model. Manufacturers continuously review warranty claims, dealership repair reports, supplier data, and customer feedback throughout a vehicle’s production life.
When engineers identify a defect that could affect safety or regulatory compliance, manufacturers work with the National Highway Traffic Safety Administration (NHTSA) to notify owners and provide repairs at no cost.
In many cases, recalls are issued before large numbers of customers experience the problem, reflecting the industry’s emphasis on preventive action rather than waiting for incidents to occur.
Safety Recalls Remain an Important Part of Vehicle Ownership
Modern vehicles rely heavily on electronic systems that control both convenience features and critical safety functions. Even a small component such as a door lock microswitch can affect systems like Auto Park and the electronic parking brake.
The latest Mercedes-Benz Recall highlights how manufacturers continue to monitor vehicles after production and issue recalls when potential safety concerns are identified. While Mercedes-Benz reports no known rollaway incidents linked to this defect, owners of affected vehicles are encouraged to arrange the free repair as soon as recall notices are received.
Owners who receive a notification should schedule the Mercedes-Benz Recall repair as soon as possible to ensure all affected components are replaced.
Frequently Asked Questions
Which vehicles are included in the Mercedes-Benz Recall campaign?
The Mercedes-Benz Recall affects selected 2019–2022 A-Class, 2020–2021 CLA, 2022–2023 C-Class, 2024 CLE, 2020–2026 GLA, 2020–2026 GLB, and 2023–2024 GLC models.
Why is Mercedes-Benz recalling these vehicles?
The recall addresses a driver’s door lock microswitch that may corrode over time, preventing the vehicle from detecting an open driver’s door and potentially stopping Auto Park or the electronic parking brake from engaging automatically.
How many vehicles are affected?
The Mercedes-Benz Recall affects 310,667 vehicles in the United States.
Is the repair free?
Yes. Mercedes-Benz dealerships will replace the affected driver’s door lock microswitch at no cost to owners.
When will owners receive recall notices?
Mercedes-Benz plans to begin mailing owner notification letters on or before September 18.
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