How to Reset a Mercedes-Benz After a Flat Battery

Written by angelo elia
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How to Reset a Mercedes-Benz After a Flat Battery
You can reset your Mercedes' dashboard service lights with a tool found at most auto parts stores. (VOITURE COUPE (allemande) ref 1233 image by Marie-Thérèse GUIHAL from

If the battery should die on your Mercedes-Benz, the airbag light on the instrument panel may stay on after you hook up a new battery. The oil light indicator also may stay on, and the radio may not work until you reset its code. You can reset the airbag and oil lights with a service-light reset tool available at most auto parts stores for about £16 to £26. To reset the radio, you will need the code included with the paperwork from the car dealer.

Skill level:
Moderately Easy

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Things you need

  • Service light reset tool
  • Radio code

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  1. 1

    Insert the reset tool into the Mercedes' data-link connector, which is near the bonnet-release latch. Turn on the ignition.

  2. 2

    Press the tool's scroll button until "Mercedes" appears on the screen. Press "OK."

  3. 3

    Press the scroll button until the model of your Mercedes appears. Press "OK."

  4. 4

    Press the scroll button until "Reset of Airbag" appears. Press "OK."

  5. 5

    Press the scroll button until "Reset of Oil Service Light" appears. Press "OK."

  6. 6

    Check that the lights are off and disconnect the reset tool.

  7. 7

    Turn on the radio and enter the radio code using the buttons on the radio. If you don't have the code, you can get it from a Mercedes dealer or mechanic. Tune in a couple of stations to make sure the radio works.

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