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.
Central locking system: Notes
The central locking system is split over several control units. The Car Access System (CAS) monitors all the processes in the central locking system. The Car Access System is the master control unit for the central locking system.
The control units involved in the central locking system are:
- Car access system (CAS)
- Footwell module (FRM)
- Junction Box Electronics (JBE)
NO RELATED
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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.