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.
Fault Storage
If there is a fault in the system, it is indicated by the airbag warning lamp.
If a fault occurs on the MRS4RD, it must be stored in a non-volatile memory (EEPROM). When faults are recorded, a distinction is made between internal and external faults.
If an internal fault has been detected, the record of the fault cannot be deleted, i.e. the control unit has to be replaced. The only exception in that regard is incorrect programming data.
External faults on system components are also recorded in the fault memory. Once such faults have been rectified, the record can be removed from the fault memory.
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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.