Was your chain noisy during the last stages? Specifically, did your chain rattle on cold starts, with the rattling going away when oil pressure built up?
I am just trying to see if there are any "symptoms" that all of us could look for, and save the damage due to a broken chain. Would appreciate anything that you can provide.
Hope your fix up comes out reasonable! BTW, do replace the chain tensioner along with the rails. Also, is your engine 16v or 8v?
(85 190E 2.3, 120 K)