New to me 2005 SL65 AMG

misfire on cylinders 3,7, 11....check engine light...resetting light lasted 3 days..light back on....change all 24 plugs or just the ones causing fault??

Remote key fob arms security system..lights flash 3 times, trunk locks, doors DO NOT lock....doors lock when placed in drive, doors lock and unlock when dash buttons selected....key fob appears to be operational: changed batteries, fob light on, infrared beam checked...just won't lock or unlock doors....I haven't checked fuse 58 behind passenger seat fuse box yet...thinking if the fuse were blown the doors wouldn't lock at all....HELP??

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MercedesMedic made a comment.
7 months 3 weeks ago

I would change all the 24 plugs. When you read the codes, did you have any other faults other than the engine missifre. You may want to consider replacing the MAF as well.

It is strange that the doors lock with the button but not with the remote. Especially since the car seems to recevice the keyfob signal. If you leave the car parked and try to open the doors after a few minutes, does the alarm go off?

 

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