Some tips here for a TD Wagon, go down to Post# 10 for a link
to a good W123 Pre Purchase Inspection write up.The list is for a 300D, but more or less the same for a 240D

300TD Buyers Checklist?

Here is one post from an old thread.
What should a pre purchase inspection cover?

Another one.
https://www.mbca.org/star-article/january-february-2010/buyers-guide-1975-1986-w123-diesel

https://ranwhenparked.net/2014/05/22/five-common-issues-to-look-for-when-buying-a-mercedes-w123/
.
.
.
.
.

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works