Mercedes-Benz C240 auto-lock feature causing lockout issues on Mercedes-Benz C240

Submitted by Doxiemom · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mercedes-Benz C240 owners report experiencing lockout issues related to the auto-lock feature, which activates under certain conditions, such as when the vehicle exceeds 9 mph or when the key fob moves out of range. While this feature is intended to enhance security, it can lead to unintentional lockouts, causing frustration for some owners. Additionally, reports indicate that the driver door pin may shake during locking and unlocking, potentially contributing to these lockout problems. Although it is possible to disable the auto door locking feature, it requires careful steps to ensure it remains deactivated. Furthermore, issues with the central locking system, such as blown fuses or key fob battery failures, can exacerbate lockout situations. In some instances, a faulty door lock actuator may need to be replaced to effectively address these concerns. Owners experiencing such issues are encouraged to consider these factors and take appropriate measures for resolution.

2 people reported this problem
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Mercedes-Benz C240 vehicles with this problem

1 model year affected
Average mileage: 70,000 miles
(70,000 - 70,000)

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