Need feedback please from somebody who has experience with 2001 E320 MAF replacement and/or cleaning. I recently had the car in at 70k miles for a B service and was advised to change the air filter. $100 for the airfilter replace (that's a another lesson learned the hard way) and at about 50 miles from the dealer on the way home the CEL comes on. Codes indicate fuel trim in bank 1 and 2 which from other posts is most likely a bad MAF. Had it reset at Autozone, it came back on a day later. I have a few questions.
1) could a new air filter (or the act of replacing it) have precipitated this failure or is this coincidence?
2) I see conflicting information in this forum on if this should be covered under the 8yr/80k emmisions warranty (I don't have access to my warranty book, it's in the car which is held hostage at the dealer). They want $605 to replace the MAF and they say the parameter values are not far enough out of spec to cover it's replacement under my extended warranty that I purchased to cover me Bump-to-Bump to 100k miles. Is the 2001 E320 MAF covered to 8yr/80k ???? I live in Florida.
3) It looks like this would be a fairly easy DIY job, saving $300.00 on my repair since I've seen prices for the MAF at about $300.00 on the net. Are there any pit falls to installing this yourself, ie computer issues, parameters that need reset, adjusted, etc. Last thing I want to do is replace it myself and still have the car run like crap, then go to the dealer with my tail between legs asking to fix it right.
Any quick advise would be greatly appreciated... I need to make decision very soon as to what I am going to do. As I said, the vehicle is in the dealer's possession and they are waiting for my decision.