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.
Junction Box Electronics Module
The junction box electronics module is plugged into the front power distribution box.
The junction box electronics module contains the relays for activating the central locking drive units.
The trunk central locking is activated via a power output stage in the junction box electronics module.
The status of the exterior trunk button is read by the junction box electronics module and this information is passed on to the Car Access System 4.
The automatic soft-close drive and the remote control receiver are supplied with power by the rear power distribution box.
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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.