20 Most Recent 2008 Mercedes-Benz Mercedes Benz Cls Class Questions & Answers

Generic OBD Error Code Details for P0798 Pressure Control Solenoid "C" Electrical What does this mean?OBD Code P0798refers to The Engine Control Module (ECM) uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical troubles of the shift solenoid valves and valve body. SymptomsPossible sumptoms of OBD code P0798- Engine Light ON (or Service Engine Soon Warning Light) - Shift shock CausesPossible causes of OBD code P0798- Low transmission fluid level - Dirty transmission fluid - Faulty pressure control solenoid valve - Pressure control solenoid valve harness or connectors - Pressure control solenoid valve circuit is open or shorted The Error code is generally activated on detection of the following conditions: The P0798 is triggered when the ECM detects an open or short circuit in shift solenoid valves Possible Solutions

replace the compessor.

$500 - rotate tires, oil, tire pressure, fluids, lube doors, etc.

Please use this for reference only since I have a 1996 C 220.
On the top center of the motor is a cover over the spark plugs. Remove the cover and you should see your plug wires. Obviously just unplug wires and remove the plugs. However I did not have a spark plug wrench the held the plug so I had to put the plug into the wire and slightly twist the plug into the opening. I then removed the wire again and used the wrench to tighten. Only do one plug at a time obviously.

Phantom coolant level warning which turned out to be erroneous. No problem found and no catastrophic meltdown. Just the inconvenience of having to take it into the dealer to be checked.

CLS info:

http://www.mbusa.com/brand/models/CLS500C.jsp