Your misfire could be caused by a worn camshaft or failing valvetrain..you could get extra for that..There isn't a TSB for this problem but ask them to check the rockerarms the are probably causing valvetrain wear that's going to reflect in marking the camshaft and lifter base...Keep puting preasure..dont give up.
Originally Posted by HDDP
Great info, but I didn't notice any issues pertaining directly to the SLK320. I have noticed an unusually noisy lifter or cam noise from the car since day 1, but just assumed it was part of the normal engine noise for that type of car. If you convince DC to issue a TSB or recall, please let us know.
I'm still trying to get them to fix a rough idle problem that doesn't show-up in any error codes on their diagnostic computers, but can be felt by anyone who sits in the car while it's idling. Good Luck !