You will need a reset tool to reset the service indicator on the Mercedes e240. You will reset the indicator by using the buttons on the dash.
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mercedes e270 cdi service indicator reset sequence
How do you reset service indicator message for A 1999 Mercedes Benz ML320 after service A or B is completed?
how can i reset the service b message on the mercedes clk 430?
mercedes benz vito 111 service reset
como resetear
Press the brake
google ( mercedes-autobestanswer) details there.
The owners manual outlines the procedure for reseting the service indicator.
The service indicator light, in your Mercedes ML 270, can be reset by holding in the engine oil life button. The engine oil life will go to 100 percent. The service indicator light should go off.