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.
Necessary preliminary tasks
- Read fault memory.
- Disconnect battery negative lead. See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
- Remove ELECTRONICS BOX FAN
- Remove distribution box (passenger compartment). See 61 13 050 REMOVING AND INSTALLING/REPLACING INTERIOR FUSE BOX
- Release control unit holder
Pull rubber grommets out of electronics box. Disconnect all plug connections.
Release screws (arrows).
Disconnect wiring harness on engine compartment side on right.
Remove electronics box.
Installation:
Make sure gasket (1) is correctly seated on electronics box.
Add final details to vehicle.
Read fault memory.
Replacement (E70 - Security):
Pay attention to engine compartment protective features.
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.