Well, thanks for the advice and all guys. I got the inspection back today.

Let's just say so much was wrong, the Mercedes dealership took pity on me and discounted the cost of the inspection.

Oh, and one of the few things that I was actually worried about, the transmission, was working perfectly fine. Just nothing else was.

I'd have to say the repeated warnings to ALWAYS get a PPI are completely correct.

Back to searching for cars again...