Mercedes Benz S350 ?

[twoblacklines]

Hi, I am looking into buying an S350 2003 with 50k, FSH. Its black and I really like it.

Are these ok to own, or expensive ? I dont do half as many miles as i used to and when i do i find myself wanting to get home because my car is uncomfortable, and being a diesel i have to change gear constantly, the idea of an automatic really appeals to me and the seats look super comfortable.

The other car im looking at is an older S500 but im not sure i even need the extra hp ?

Thanks