I'm having trouble starting the car. When it idols the RPM's pulsates up-and-down and then it stalls. Once under way the car seems to run fine but without any warning it will die as I start to

SOURCE: engine stalling

hi,you my check the distributor cap and rotor clean or replaced if necessary.

SOURCE: 2003 Mercedes C320 coupe. Car died on my way home

Hi ddansvob-

Most of the codes for Mercedes C320's can be cleared (at least temporarily) by disconnecting the negative terminal of the battery and leaving it disconnected for at least 1 minute. I would give it several minutes just to be sure.

There is also a reset procedure that you can use that involves disconnecting the battery, turning the ignition to position 1 several times and then reconnecting the battery. That procedure can be found with a google search.

Possibly the easiest way though is to visit an Autozone or other similar store that has an OBDII scanner that they will use for free on your car, and have them reset the codes. If there is an actual issue with a sensor, etc. though, the code will come back up after the car has been started a time or two. If that is the case, you are going to have to troubleshoot the actual cause of the code, involving finding a Mercedes shop that will help you with identifying what sensor(s) are causing that code to show up.

If your mechanic used non-OEM parts/battery, that is very likely to be the source of your problem. Assuming that they didn't do that (which would be unusual for any mechanic to do), you are likely looking at replacing a voltage sensor or part of the voltage regulating/distribution system. If you get to that, you are REALLY going to need an experienced Mercedes mechanic.

Good luck!

SOURCE: 1999 Mercedes Benz ML 430 periodically stalls at idle

Hi, Joe here The problem sounds like a faulty crankshaft position sensor. The sensor is located on the transmission bell housing on the left side. Can be accessed threw the top of the engine near the firewall.

SOURCE: car dies when heater turned on

Assuming your charging system is working properly-You probably have an idle speed control problem. Behind the battery there is an over voltage relay with red top and a 10 amp fuse in it. This relay powers the a.b.s. and the idle speed control unit. Make sure fuse is o,k, and that the relay is not corroded. Next there is 2 micro switches on the throttle linkage(you will have to remove the air cleaner. This switches are tested with an ohm meter and show continuity in one position and open in the other(don't worry if the ohm reading is high).Next to the over voltage relay there is 2 black relays(one fuel pump the other is climate comtrol) The one that says klima is the climate control. Make sure it is not corroded and a lot of times the electrical connector gets bowed and you will lose contact. This relay is really more of a control unit and gives input to the idle and c.i.s. control units as far as the a/c and heater operation. Hopefully I have been helpful

SOURCE: 1986 mercedes benz 230e runs rough and stalls

typically, this describes a dirty fuel filter.