Welcome aboard
because it is a 1974 240D
. Is the friend very knowledgeable in these cars? Has he ever driven a 240D prior to this test drive? All of these cars drive like that
. Try to find someone that is experienced in these cars to do a PPI (do a search on the button at the top right of the page to find out more about them).
If there is no rust and the car is inexpensive then I would go for it?
good luck