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.
Vehicles With Steering Wheel Buttons
1989 Mercedes Benz 420SELSECTION Vehicles With Steering Wheel Buttons
NOTE:
TPMS activation is accomplished by using the multifunction display control buttons on left side of steering wheel.
- Turn ignition switch to OFF position.
- Ensure inflation pressure of all 4 tires is set to specification.
- Make sure that the ignition is in position 2 in the ignition lock.
- Press the LEFT or RIGHT ARROW button to select the SERVICE menu.
- Press the UP or DOWN ARROW button to select TIRE PRESSURE.
- Press the OK button. The multifunction display shows the current tire pressure of the individual tires, or the message "Tire Pressure Will Be Displayed After Driving A Few Minutes".
- Press the DOWN ARROW button. The message "Use Current Pressures as New Reference Values" will appear.
- Press the OK button. The message "Tire Press. Monitor Restarted" will appear.
- After about 10 minutes driving time the current tire pressures are displayed. The activation process is complete.
RENDER: 1.0x
NO RELATED
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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.