Mercedes Benz S430 Problem...?

have 2002 mercedes benz s430 , in speedometer area there's little screen shows how many miles have put on car, how fast going, changing radio stations, etc... every time turn on car on screen says, "service - exceeded on 900 miles" -- engine making small crackling sounding noise. don't know if has service thing. have ideas?

i have 2002 mercedes benz s430 , in speedometer area there's little screen shows how many miles have put on car, how fast going, changing radio stations, etc... every time turn on car on screen says, "service - exceeded on 900 miles" -- engine...

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