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.
Functional networking
A complex system network with distributed functions in other control units is necessary for implementation of the lane departure warning as well as the high-beam assistant.
The following graphic shows the system network of the lane departure warning and the high-beam assistant using the example of the F2x, F3x, F15.
| Item | Explanation |
|---|---|
| 1 | Dynamic stability control (DSC) |
| 2 | Heating for KAFAS camera |
| 3 | KAFAS camera in the inside mirror |
| 4 | Front power distribution box, front passenger |
| 5 | Front Electronic Module (FEM) or Body Domain Controller (BDC) |
| 6 | Power distribution box |
| 7 | Reversible motorized automatic reel, right (REMABF), model-specific |
| 8 | Central information display |
| 9 | Headunit (HU-H, HU-B) |
| 10 | Integrated Chassis Management (ICM). Omitted if the vehicle is equipped with the latest generation of DSC (MK100). |
| 11 | Steering column switch cluster with vibration actuator |
| 12 | Operating facility for light |
| 13 | Assist systems operating facility |
| 14 | Instrument panel (KOMBI) |
| 15 | Reversible motorized automatic reel, left (REMAFA), model-specific |
| 16 | Head Up Display, model-specific |
| 17 | Camera-based driver support systems camera control unit |
If only a high-beam assistant (5AC) is present, the system network is as follows for the example of F2x, F3x, F15:
| Item | Explanation |
|---|---|
| 1 | Instrument panel (KOMBI) |
| 2 | Inside mirror with camera and control unit high-beam assistant (FLA) |
| 3 | Front fuse and relay module |
| 4 | Front Electronic Module (FEM) or Body Domain Controller (BDC) |
| 5 | Front fuse and relay module |
| 6 | Steering column switch cluster |
| 7 | Operating facility for light |
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.