6 M/T History Question

[Bayerische E53]

I'm not sure if anyone would know the answer to the following questions:

1) From what month/year until what month/year were the 6 M/T vehicles offered? I've heard that the 6 M/T was only offered on 2005 model year vehicles that were built in 2005 (i.e. not in 2004 build cars marked as 2005 model years). However, my car was built in November 2004 and it has the 6 M/T/ What gives?

2) Is there any way to find out how many 6 M/T vehicles were produced?

3) Does any one have any idea whether my car was built in Germany or here in the USA?

I keep getting conflicting information to all of these questions so if anyone knows, please share!