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.
1993 Mercedes Benz 400EFACTORY OEM SERVICE PROCEDURE
Vehicles With Multifunction Steering Wheel Controls
- Turn the key to position 2 in the ignition lock.
- Press the forward or back button on the steering wheel (left side) repeatedly until the standard display shows.NOTE: Standard display is the odometer/trip meter. On most models, the standard display will show when the ignition is turned on.
- Press the up or down arrow button on the steering wheel (left side) repeatedly until the current pressure of the individual tires is displayed, or the display shows the following message: "Tire Press. Displayed After Driving For Several Minutes".
- Press the 0 (2) reset button on the instrument cluster (Figure). The following message is displayed: "Monitor Current Tire Pressure?".
- Press the + button on the steering wheel (right side). The following message is displayed: "Tire Press. Monitor Reactivated".
- The tire pressure monitor activation process has begun. The tire pressures measured for the individual wheels are stored as the new reference values, provided that the tire pressure monitor considers them to be plausible.
NOTE:
If you wish to cancel the reactivation process: Press the - (minus) button on the steering wheel.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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