How big a job is the timinmg chain replacement on the 190E 2.6?

Each morning the car starts with this :chatter chatter chatter", then settles down. I'm guessing that's the timing chain and other things.

Well, I have taken the car to two different mechanics, one a dealer, and both "skirted" the topic. Almost like they didn't want to go there.

Feeling trust with a mechanic is important - I walked away from both.

My personal experieinced with the 103 engine have been painful - in short because things are so close to each other. Well engineered - but a pain get at parts.

So what are your thoughts - I'm an average DIYer. Should I or the mechanic be ovoiding this operations?

__________________
Thanks for the help
Bill Fisher

'86 560SL (186K) - Now a 'classic' : Registered as an Historic Vehicle
02 E430 in the stable
'14 LS460 (Lexus)
- - - - -
'95 E420 (198K) found a new home
'99 E320 (80K) (gave it's life for me as we hit a bumper)
'95 E420 (231K) Sold to a happy buyer, new to Mercedes
'90 300E (65K) Sold to an Mercedes Lover
'92 190E (215K) - retired to the salvage yard
'93 500SEL (214K) - Moved to another family, still runs like a young pup