| Component | Function |
| Engine control unit -J623- | Collection and calculation of data. |
| Oil level/oil temperature sender -G266- | Registration of oil level and temperature. |
| Front right speed sensor -G45- | The speed sensors are used to calculate the vehicle's speed. Depending on the drive type (quattro or front-wheel drive), 2 or 4 speed sensors are installed. The speed is calculated by the ABS control unit -J104-. |
| Anti-theft alarm and vermin repellent system contact switch -F120- | Monitoring of whether bonnet is opened. |
| Engine speed sender -G28- | Registration of engine speed. |
| Control unit in dash panel insert -J285- | Adaption values and calculation of oil change service date. |
