I want to have the timing chain wear/stretch checked on my '81 300D (123 130 model with 617 engine). Our local dealer and another MB shop say it can't be done (probably just don't want to fool with it) but MB tech rep told me on the phone the instructions (28 steps) are in the service manual. (I know from past Shop Forum messages that this job can be done and should be done when have valve cover off to adjust valves.) I have a mechanic now who can and will do the job but he needs the instructions (they aren't in his Haynes book). Anyone have these who would email or fax me a copy? Thanks.