Okay gang, this is for my 603.961 Head gasket failed on it, so I have acquired a reman No 17 head, injectors, prechambers, etc. I have some serious confusion about what timing cover I need to find or purchase new for my setup.

Now, the bottom end has the original timing cover and it seems they have been updated many times by MB as they can crack at the tensioner bolt. Since I am going to install the new head, I may as well do this (yes new timing chain is here along with guides) upgrade while the thing is in pieces.



First PN in EPC for the 126.125 is -

603 010 01 17

603 010 02 17 replaces the previous

601 015 06 01 replaces the previous

BUT if one views the W140 stuff, starting with the 140.135, the timing case is now 602 015 01 01. That is the only one listed.

THEN the 140.134 reads...

603 010 02 17

601 015 06 01 replaces the previous up to engine .971-007421

604 015 01 01 replaces the previous from engine .971-007422



So what the hell cover should I purchase? 601 015 06 01 or the 604 015 01 01

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