I say that is your call but I don't know the custom in Germany. I did not tip him when he picked me up at the airport and dropped us at the delivery center. However, I did tip the taxi driver who picked us up at Harms and took us to the airport...but we were in "get rid of the Euros" mode at that time....
2001 530i/5 (E39), Topaz Blue/Stone Green/Black (118k miles) *very rare interior/exterior color combo*
2005 545i/SMG (E60), ED Order, Titanium Grey/Grey (lease over)
2015 335i, ED Order Summer 2015