I can confirm it had 4 doors.

Due to the tight schedule I was able to provide Jess rental details only today. Let's see if she can help.

btw. returning the car I've seen on return receipt that the car class for 4er GT (2.0d) is recorded as LCAR (US convention - http://www.sixt.com/fleet-guide/) whilst this matches more FWMR(AR?) for Germany where 3er is listed.

Certainly this 4er GT wasn't LDAR class without any questions.

Let's see what Jess from Sixt can do here.