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Hey guys! I recently just fixed a P06DA (Oil valve control inside the oil pan) code on my 2016 C300 4Matic. After the fix, drove the car for about an hour. Early morning the next day I was heading towards my morning class, and the car immediately sounded and felt like it was misfiring. I pulled over on the highway and scanned the car and got a P21977 (Mixture control, cylinder 1). I called my buddy at his shop and I brought it to him, and after scanning every sensor and watching the live data for 3 days straight we still couldn't figure out what happened. Then on one of my drives back home from his shop while it was misfiring, I got 2 more codes. P219E78 and P219F78 (Mixture control in cylinder 3 and 4). I don't get any other codes except for a U0412, but everything with the battery seemed fine with multimeter and scan tool watching voltages around the car. I have no idea where to go from here. We found a vacuum leak right out front of the turbo, fixed it, and nothing changed. I found I put the downpipe on a bit crooked off the rear of the turbo, fixed it, and nothing changed. Originally I thought cylinder 1 might have cracked, but then I got the same code for cylinder 3 and 4. If anybody has any ideas, please let me know. I feel the coincidence is too crazy that all these codes and misfires happened not even 12 hours after getting the oil harness fixed.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
