On my dad's 2000 E320 I was told to look out for the harmonic balancer, and to the now obligated Tranny flush (always a good thing, even if they they you it's supposed to use the same fluid for the lifetime of the car/tranny). Other than that I think that's about it. Looks like your father's car will still be under warranty so that's less headaches!
Enjoy the car!
ps: Bienvenue sur le site mon ami!