Oh, yeah, that's right, Quadra Trac is Mercedes.
I get those teutonic manufacturers mixed up....

I know what you mean about diesels, they can be vibration monsters. Glad to hear they got this one right.
Speaking of which, Mercedes builds some darned nice diesels too. I have an old 1984 300CD turbo diesel that is a pretty cool old ride.

Those Germans know how to make a car. Or pretty much anything mechanical for that matter.