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.
On Board Computer
The On Board computer of the E46 contains the following functions:
- Time
- Outside temperature
- Average fuel consumption
- Driving range on remaining fuel
- Average speed
The current time is always displayed when KL R is switched on. Any other BC display value can be called up by pressing the turn signal lever.
To set the clock "turn" the odometer reset button to the left or right to set the desired time.
To reset any other programmable displays - hold the turn signal lever in for > 2 seconds.
A freeze warning is incorporated into the BC. If the temperature drops below 37 degrees, the gong will sound and the temperature display will flash.
The displays of the Board computer can be changed over from Fahrenheit to Celsius by pressing the instrument cluster button and switching the ignition key on. IHKA display will also change over. The average fuel consumption and average speed displays are reset by pressing and holding the turn signal lever for > 2 seconds. The BC then starts to calculate new average values.
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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.