2008 Mercedes c300 will not start, battery is fine

Helo, have you tried replacing the battery on your fob key?

dead battery in fob or need to reprogram fob or system failure

Flash key fob

i have mercedes c300 2008 . on my dash default withholding system and d'not start what is the problem with my car

You may need to reprogramm the remotes tothecar again. That needs to be done by the MB dealer with a special tool and can't be done at home.

More likely than not, you have the famous broken solder joint(s) at the coil inside the FOB...if that is fine and all solder joints look fine , then you had best get MB, or a good Mercedes Independant garage, to check the EIS and make sure it sees the key

HI k2mrk the problem is the remote is not being used long enough to charge internal battery
and that's cousin your lock&unlock function not work until you place in the ignition
The way to solve is try use remote at lest ones a day .

good luck

put key in ignition and turn to on position push key fob to on/off positen for about 30 seconds this should reset system.adrian.,,,,

If key will not turn
Car battery flat,charge or jump to activate elec ignition

I have a 2001 C240 with the same issue. I removed the positive battery cable from the battery and kept it off for 30 seconds then replaced it. Everything was reset and the key worked.