I've got 2 myself. The TD is truly a great car. Rarely a problem. The 240 is constantly needing something.
So, from what I have learned through experience is that you can find a car that doesn't need much but you'll need to pay a bunch of $ intially. Then, on the other hand, you can get a cheap car that is always demanding attention.
Moral to the story is the old saying "Nothing more expensive than a cheap Mercedes."
Maybe you want to find another car in better shape. Bail out now before you get too deep into it.
Cheers,
Bill