This worked on E220:
Ignition on 1st notch > press Page button until Settings > press Up Arrow to Time/Date > press up arrow to Hours > adjust with + or - > press up arrow to Minutes > adjust with + or - then press Reset button to confirm and you're finished.
12V 72Ah
Assuming E230 is what is written on the vehicle? It indicates that its an "E" class mercedes, and the 230 indicates its a 2.3 litre engine.
I believe that each radio has its own code, you will have to get it from a dealer.
the engine size for Mercedes its always the number in this case its 2.3
Try disconecting the battery for a couple minutes,it worked for me..
Inside the trunk.
Take it to a mechanic
how to change poly belt on 2003 E320 mb
take it to your local quick-e-lube.
You just go to the Service and they will change the oil for you
230 = 2.3*102 or 2.3 E 2
Mercedes-Benz E-Class was created in 1995.