diesel guy here, I'm not as familiar with MB gassers. But I like the styling of later s124s.

Can anyone tell me what to look out for when shopping around for s124s?

I'm going to be looking for rust free beaters, so the more info the better.

I'm very familiar with w126s and w123s even w140 diesels, but not much experience with w124s.

typical problem areas?
typical rust areas?
parts that are expensive when broken?

I might swap in a OM606 down the line, but If the M104 is economical and reliable I might just leave it.

I heard M104s are pretty stout, but what kind of fuel economy should I expect? I have a 6speed laying around from a w203, would that help much in the MPG department?

Thanks for any help

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1974 240d
1983 240d -sold
1989 420sel with om606
1994 s350 turbodiesel - sold