OKAY, i found out. it was not w6 but it was wg with an emblem that really looked like a 6 which was strange. i was at the super market and noticed a black e70 with the same exact emblem, it is a West German BMW (dealership)
http://www.westgermanbmw.com/ its is place on the rear of the vehicles on the opposite side of the model emblem (i.e X5) and is very similar to a bmw emblem.