Good job. Sounds like a great buy.
On the sunroof, I'm pretty sure all you need is to lubricate the tracks that the sunroof glides on.
The tracks get dry and the sunroof will almost get stuck or not move at all.
If you get the service done, point it out.
Believe me, it happened to me once, and after lubrication, it moved like normal.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".