Don't worry, first time I ever saw a 4-matic I thought the same thing. An almost new W124, I used to ride to school in the third row seats in it.
Now, 200,000mls and 12 years later, we own the car!
But that was before we had any MBs, I'm somewhat more clued-up (and old enough to drive) now..
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black