Mercedes 300 se

try pushing on fuel door (push on side closest to front of car)

All Mercedes are negative ground and you should be able to follow the ground terminal a short distance directly to the body.. Do not hook it up backwards.

Cable binding, do not press gas when starting, speed sensor on the wheel could have failed or be dirty, ASR module could be bad, upper engine wiring harness could be failing. Go to benzworld dot org or peachparts dot com for more specific help and guides.

It is over by the battery, go to benzworld.org or peachparts.com on how to make a code reader and how to read the codes you find.

engine wiring harness upper and lower could be degraded, coil could be bad, throttle positioner, fuel distributor could be bad and depending if its a half year car and you have an OVP that could be bad. Also after a full tune up have someone adjust the duty cycle.

Check and make sure that the transmission isn't over or under filled. If not, the clutches that operate the reverse gear Are probably too worn, and don't operate until they are expanded by heat.

They only come on when you spray the windshield with washer fluid.

The fuel shut off valve is not getting the correct amount of vacuum OR the fuel shutoff valve is failing.

You will need 1/2 to go over EVERY SINGLE vacuum line and check for leak.

Even it's look OK. Give it a little push to ensure 100% seal connection.


If this does not help then the vacuum switch next to the steering lock (behind dash) may be leaking or failing.

The switch is about $36 from the Mercedes dealer.


Good luck

hello,you have a 300 se with 103 engine (straight 6 cylinder) we have two possible cause of the problem,fuel and ignition side,on workshop they have a fuel gauge to check the fuel pressure (filter,fuel pump,fuel pimp relay) on fuel side,then for ignition spare plug,distributor cap, rotor,switching unit (transistor box for ignition side,ok, when your engine stop,try to hear from the rear,if your fuel pump motor is working,or you can remove your spare plug to determine what is missing fuel or ignition,ty

Ok that changes thing, is the low pressure line from the compressor getting frosty cold?