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.
Brief description of components
The CAS consists of the following components:
- CAS control unit
The CAS control unit is the master control unit for a number of systems.
The CAS control unit is connected directly to the K-CAN (Body CAN).
- Ignition starter switch
- E60, E61, E63, E64 up to 09/2005
The ignition starter switch switches the individual terminals of the ignition lock.
Four Hall sensors are installed in the ignition starter switch. The Hall sensors read out the terminal status. The signals are forwarded to the CAS control unit.
- START/STOP button and slot
The ignition switch has been replaced by the START/STOP button and the slot for the remote control.
- Electronic steering lock
The electronic steering lock replaces the conventional mechanical steering lock.
The electronic steering lock is located directly on the steering column.
The electronic steering lock consists of a drive with gearing and locking pin. Electromechanical unlocking and locking is controlled by the CAS.
The electric steering lock is discontinued on the following vehicles:
- E90, E91, E92, E93 from 12/2006, only US version with automatic or manual transmission
- E60, E61 from 03/2007 with automatic transmission
- E63, E64 from 09/2007 with automatic transmission
- E70 from start of series production
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.