20 Most Recent 2004 Mercedes-Benz C-Class - Page 3 Questions & Answers

Nothing to do with fuel economy my friend,but that black soot is brake dust from your front pads.THAT's whats doing MOST of your braking.The front.YOUR problem,believe meit is YOU,is the fact that you do not use the emergency brake ever.Each time you put that emergency brake on,it adjusts the rear brake up a bit more,until eventually you have even braking force all around.Use the emergency brake EVERY time you park the car and get out.Eventually you'll notice that the black soot is minimal,but it will always be there a bit.Just keep the rear brakes adjusted up by using the e-brake a lot when stopped.That's also why the front pads ALWAYS wear out and back are still fine.NO emergency brake use.Rigger

The transmission is sealed and has no fill point, see the dealer for service and adding of fluid.

The engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPEDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

This could be a problem with the delivery of power to the ignition or effects of temperature. Try jump starting the car by connecting it to the battery of another. While the other car idling, try to start the car. If it starts it may be the battery or the alternator is the issue. I would suspect the alternator like you said it happened after drives. The alternator may not be charging the battery properly. Heat from the engine may affect the electrical parts of the car. If jump starting does not work, your starter motor may be acting up due to the heat. It may be weaker because of it. Check also the relay of the starter, the wires and cables for loose connection or insulation that may have gone bad that needs replacing.

The module must be programmed for your car.

Short in the arm. Change the wiper/turn signal lever.

Yes, the doorjam switch is either shorted or broken. This switch is on the cabin door opening by the hinges. In rare cases the pin may be self adjusting. Sometimes you can press in the pin by hand to see if it shuts off the interior light. Do not slam the door with your finger in the hinge area.There may be a problem with the door adjustment or the hinge may be broken and you do not know it. It can be a lose or broken wire inside the cabin shell.