Indications are that they are
hard starting when cold indicates a problem ambient temp sensor or BARO sensor
These sensors report to the ECM so that the correct air/fuel mixture is set for cold starting and running---sort of like the old fashioned choke pull
have the fault codes read to determine where the faulty sensor is
SOURCE: I put my key in
There's a good chance the key is worn or the ignition lock. If you don't have another key you can order one through a Merc dealer via the chassis number.
Cheers John
SOURCE: getting fuel, won' start
1. Check if you are getting spark from the distributor cap, if no, go to #2.
2. Check if you are getting spark from the ignition coil, if no, go to #3. If yes, your distributor cap is worn out.
3. Check if you are getting voltage to the coil, if no, it could be the ignition control unit that is faulty. If yes, your ignition coil is faulty.
SOURCE: STALLING PROBLEM TURNED INTO NO START 1990 MB 300 SL
hello,good day,first we are in fuel side,better to install a fuel gauge,to determine the right pressure, is not mention your fuel pump relay,this should also check,some occasion the power supply is missing,now if all is in order (fuel side) then your switching unit(transistor box) need tobe check,assuming your engine is 103 engine,ty
SOURCE: I have a 2001 Mercedes C320 that goes into limp mode
have you spilled any liqueds into the shifter if so it will cause a short in the unit causing it to react like yours.
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