You are not alone...
I had a plan as well. I drive a LOT to make a living so I figured I'd get out from under some debt and save some gas $$ (Current fuel prices are cutting into my bottom line. I make quite a bit of $$ from mileage) by getting one of those "bulletproof, run-forever MB diesels".
*sigh*
It's in the garage waiting on parts and I'm driving the wifes car for now...
Nothing mechanical other than freshening the suspension but electrical/vacuum problems have cropped up which are a PITA to sort.
I spent $3500 on a car with less than 100,000 miles on it (Pretty sure it's accurate because It came with all the service records) to avoid these problems but here they are
Hopefully it will be worth it. I have a 250,000 mile 300SD that I fell in love with driving and decided to get another "good one" for a daily driver. It aint doing much drivin'.
Hopefully it will be worth it...