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.
Test 01 Roll Mode With System Test (Sequence As Before On E36/4).
Test function 01 enables the workshop to conduct a short test of the instrument cluster. Once the function has been started, at display intervals of 3 seconds, the following information is displayed in the LCD:
Display and point allocation in trip-distance and mileometers (GWSZ/TWSZ)
| MW scope of delivery | 6 digits | 1 |
| Code No. of data set | 5 digits | 2 |
| k-number | 4 digits | 3 |
| - - - - - - | 6 digits | 4 |
| Software version | 2 digits | 5 |
| Amendment index | 2 digits | 6 |
Next, the microprocessor moves the pointer (speedo, tachometer, tank, coolant temperature) uniformly to limit position and back. All LCD segments are activated for this period of time. The test procedure then terminates automatically.
Premature termination occurs when the trip-distance-counter button is pressed with terminal R OFF or continued selection after terminal 15 and also when travel impulses arise. In the latter case, the prevailing km reading is displayed once again.
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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.