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.
How It Works
The AHL control unit uses dynamic driving data to calculate the movements of the adaptive headlights and the automatic headlight-range adjustment.
The AHL control unit must be coded with the vehicle-specific data.
Vehicle-specific data includes, for example:
- Wheelbase
- Height of headlights
- Data for the headlight headlight-range adjustment (characteristic curve)
Data specific to the headlights is coded in the SMC (stepper motor controller).
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.