They definitely had a corrosion problem in the W210 chassis. This was completely and thoroughly solved in the W211 and later (so long as the body panels are undamaged).

Also another thing to consider, be sure you have a way to diagnose the electronic systems on these cars. If something goes wrong (and it will at this age) you definitely need a decent diagnosis machine.

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

Any suggestions on good OBD for this car?
would be nice if it works well on e320cdi I own-- too

thx