Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic Locking When Driving
Whether the automatic locking function is activated on delivery or not is market dependent. The function is deactivated at the factory. The setting can be changed via the menu in the Infotainment control module (ICM).
If this function is activated, the side doors and tailgate lock when the speed exceeds 7 km/h (5 mph). This is on the condition that all side doors and tailgate are closed, the engine is running and the vehicle is moving forward. Information about whether the engine is running or not is discovered by the Central electronic module (CEM) via a calculation of different signals that are transmitted from other control modules to the Central electronic module (CEM), e. g. key position.
Indication about whether the engine drives the vehicle forward differs between vehicles with a manual or automatic transmission.
On vehicles with an automatic transmission, the gear selector position is obtained from the Transmission control module (TCM). The gear selector must not be in P or N in order for automatic locking to work.
On vehicles with a manual transmission, the Central electronic module (CEM) receives information about the vehicle's speed from the Brake control module (BCM). At the same time the accelerator pedal must be partially affected in order for locking to be carried out.
The door can be unlocked again as normal using the central locking switches.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.