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.
Phase 1 Initialization
Phase 1 begins with terminal 15 ON and remains active until the respective seat belt contact is closed or terminal 15 OFF is detected.
At terminal 15 ON, the fixed indicator lamp for seat belt warning in the instrument cluster is activated until the seat belt is fastened. The seat belt warning lamp requests the driver to buckle his/her seat belt.
No warning is given over the first 200 m if the seat belt buckle is detected as open (unbuckled). This provides the driver with the opportunity to drive out of the garage for example and to close the door or to reposition the vehicle without the audible or visual warning signal triggering.
An audible and visual warning signal is given after a distance of 200 m has been exceeded and the system detects that the driver's seat belt buckle has not been fastened or the front passenger's seat belt buckle has not been fastened and the seat is detected as occupied.
The gong is additionally activated intermittently for maximum 90 sec or until the seat belt is fastened . At the same time, the variable indicator lamp with the seat belt warning symbol is activated. On vehicles with the central information display, a text message "Fasten seat belt" is displayed for maximum 23 sec.
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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.