CLK w209 200K misfiring
12-02-2019, 06:39 PM
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Clk 200 k w209
CLK w209 200K misfiring
Hey guys i have a w209 clk 200k, which has recently started to randomly misfire, at the start it was a slight vibration that i could feel when the car was steady. I took the car to a mechanic and he disconnected the MAF wire and the vibration stopped i then purchased an after market one and had it replaced but the misfiring got worse, another mechanic suggested that it might be the spark plug and injection coil packs, so i had these changed to but every time i clear the codes they come back. With P0301,2, 3 and P0171. I checked the vacuum lines around the valve cover but can see any thing wrong with them. any suggestions to what might be the problem as i cant be asked to go to another mechanic and pay for something thats not causing the problem.
12-02-2019, 08:41 PM
#2
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My path of pursuit would be things associated with the P0171 and looking at what would affect the entire bank. I would recheck the vacuum lines and my next focus would be the O2 sensor. I have no idea how to check the O2 sensor, but you could do a search on the forum or the web in general.
03-31-2021, 04:32 AM
#3
My path of pursuit would be things associated with the P0171 and looking at what would affect the entire bank. I would recheck the vacuum lines and my next focus would be the O2 sensor. I have no idea how to check the O2 sensor, but you could do a search on the forum or the web in general.
Does anyone know or have a layout diagram for the vacuum lines for the clk200 w209?
I have one which is just hanging around.
Btw, I had a similar issue, it could be your MAF sensor... Buying a cheap knock off can cause the problem, you better off buying a used one from another clk on ebay, just match the part number.
Also check the egr solenoid lines, they are under the engine cover.
