Yeah the diesels in the w123 MB's were bomb proof. I used to wrench for MB as their diesel guy, haha I didnt have to do squat, just oil changes and valve adjustments, my daily beater benzo has 513,000kms on it never had a head gasket just 2 or 3 timign chains, valve adjustments and oil changes. Indestructible. We had one longtime customer, the mechanic I worked beside had been working on it since it was brand new in 82, an 82 SD, and it had 827,000kms on it, no rebuild no headgaskets, just valve adjustments, t chains and oil changes, this guy was super anal, his car was mint. My personal car has pretty low compression, probably wont make it much over 600,000kms likely due to the previous owner not taking as good of care of it as I do. But I cant complain i have put about 45,000kms on it since last year and I bought it for about $1600CAD and I havent done anything to it, they are so reliable, its funny cause I build vw diesels for all my customers and they always ask why I dont drive a vw diesel, i just laugh and say "cause I want a relaible car" :lol:
Holy goat trail, ok the purpose of all that was, that the MB 617 mb motors are bomb proof largely because of their cast iron head, I have never seen or heard of fromm all the mb mechs I know replacing a head gasket on those engine from normal use. ANd yeah the fuel mialge is good for the weight of the car, they arent fast or anything but man if you want an ultra reliable car with all the options you could want in the 80's those old w123's are the best cars you can buy.