Advice on buying this 300te 4 matic

[tame55]

Looking for some advice on this 1991 300te, I have been looking for a Mercedes wagon (4matic) for a while and this one seems to be in decent shape. I want to buy something similar to my 92 400E so I can do some work myself.
I do not think I would pay more than $2000 for it, Dealer is currently asking $2499.

The car has service records up to 128,000 all done at the dealership. It currently sits at 156,000 so there is a 28,000 mile gray area on the books. 2 previous owners. Carfax with no accident history.

Anyone have any tips/advice on what I should look for when I go to see the vehicle?

Dealer link here:
http://www.highgearmotors.com/CarDealer/vehiclemain.php?id=375&page=1

Craigslist here:
http://minneapolis.craigslist.org/hnp/ctd/1720952203.html

Thanks in advance,
Luke