86560SEL said: talked to a guy with a 1994 S420 and he said he has owned several V8 80s and 90s Mercedes and never changed timing chains, etc and never heard of this being a problem. I told him I thought it was preventative maintainence and not so much the chains, but moreso the guides and rails get brittle with age.
________________________________________________________________
Timing chain and related parts failures are never a problem....until it happens. The guy you talked to was lucky if he indeed was driving 126 series V-8 cars and never had a failure, assuming his cars had not been updated.

__________________
1986 560 SEL (159K miles)