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2012 Mercedes-Benz C250

//2012 Mercedes-Benz C250

2012 Mercedes-Benz C250

Mercedes-Benz C250

Mileage
83,602
Service Date
1/27/2023
Services Performed
  • Road tested. Verified concern. Check engine light is on. Verified the vehicle shaking when driving over 30mph. P0301 and P0304 are stored in the engine control module. Cleared fault codes. Road tested. Check engine light came back on. Fault code P0301 is stored in the engine control module. Swapped cylinder 1 ignition coil with cylinder 2 ignition coil. Swapped cylinder 1 spark plug with cylinder 3 spark plug. We noticed a lot of oil in the spark plug holes while swapping the ignition coils and spark plugs. Cleared fault codes in the engine control module. Road tested. Check engine light came back on. Fault code P0302 is stored in the engine control module. Found cylinder 1 ignition coil has failed. Recommend to remove and replace all 4 ignition coils and spark plugs. Recommend to remove and replace valve cover gaskets.
  • Removed upper engine cover. Removed ignition coils. Sucked oil out of spark plug holes. Removed spark plugs. Cleaned spark plug holes. Replaced spark plugs and ignition coils. Re installed in reverse order of removal. Cleared fault codes in the engine control module. Road tested. Check engine light did not come back on. Fault codes did not re appear. Vehicle is no longer shaking when driving over 30mph. Vehicle is operating normally.
  • Loosened engine wire harness. Loosened crankcase breather pipe. Removed valve cover and gaskets. Cleaned oil stained areas and sealing surfaces. Replaced valve cover with gaskets and crankcase breather. Re installed in reverse order of removal. Verified engine oil level is correct. Road tested. Vehicle is operating normally.
 
Jeremy M. gave our service a 5 star review on 1/27/2023
2023-01-28T23:01:53+00:00