The causes for this DTC may include: Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors. Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0304 for number 4. A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture. A large air leak at or near the number one oxygen sensor would also cause a lean mixture. A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0420 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter. A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area. The Mass Airflow sensor will also cause this problem. It would be accompanied by a code such as P0100 -- Mass Airflow circuit malfunction. The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture. Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks. If you need further help, reach me via phone at https://www.6ya.com/expert/david_1f7d1c330c9dd97d
Look in your glove box in the owners manual or with the papers you got when you got the car, and see if you have a card or a piece of paper that tells you what the code is. If not you will have to call your local mercedes dealer and give them your vin/serial number and they can look it up for you. If you need further help, reach me via phone at https://www.6ya.com/expert/david_1f7d1c330c9dd97d
Mercedes engine numbers are of the format xxxxx xx xxxxx. They are usually located on the engine block just below the head (drivers side). Please provide more information....where did you get the number you are using(on what part of the engine), any other info that will help If you need further help, reach me via phone at https://www.6ya.com/expert/david_1f7d1c330c9dd97d
The reason this is happening is because you have water drain canals that are plugged with debris and cannot expel out the water from gathering on and near the sunroof. I take you have a sunroof, well to the left and to the right of the sunroof are two openings, these are water canals and should be cleaned out. you should use compressed air to stick in the holes and blow whatever the clog is by blowing it out, then the water can expel from that center point of gravity without backing up and flooding out your center dome light. which by the way, this is dangerous to have water in the dome area due to electrical shorts. If you notice other weird electrical issues happening, its more than likely from the water and damage with water being in and around the dome middle head panels. Hope this helps.
Check out youtube video below:
Check the Vacuum line going to the Intake Pressure Sensor located on the top left side of the engine as your standing in front of your vehicle.... They usually Dry Rot and Crack causing a Vacuum Leak!!!!
Maybe you're looking in the wrong area. You said it started to idle rough and kept shutting off. That could also be a fuel related issue. Possibly a clogged fuel filter or weak fuel pressure from the pump going bad. Check your fuel pressure. If you discover that the fuel pressure is correct, then make sure you have a strong blue colored spark from each coil by taking a good plug and plugging it into each coil while its out of the cylinder. Have someone spin it over and watch the color of the spark. A dull orange colored spark could mean bad coils or even the computer itself.
If you want this cheap and easy, I recommend you take it to your local dealer, make them pull out the codes for you, and then you can easily find out what the code means by using google. then you attain and replace the part mentioned for the code
Does your enginelight turns on, and if it an automatic gearbox with which milage.....Further no probs when flooring it?. No leakge under your car in the morning?.....24v?, thx for the data
If the pump works but no water comes out, then the washer nozzles might be clogged. They're usually unblocked using a small safety pin. Also check the hose line from the pump to the washers as they might be perished. If there's no pump noise then it might be (a) pump fuse, (b) corroded contacts (c) blown pump.
