First gear lock up in 722.3 C36 AMG?

[JayRash]

guys,
i need help figuring out how to make my C36 lock up its first gear like in the W140 500SE, I.E in my 140 (1995) if i put the leaver in the B position it will not sift into second even at WOT and even if it hits the limiter. the B position is nothing but an electrical switch that engages the kickdown function (plz correct me if i am wrong here). So what is it that keeps the gearbox from shifting into second if the leaver is in B?


I need this as it will be a serious advantage in auto X events and even in drag races as i can then hold the first all the way to almost 7K and that means higher RPM when it shifts into second.

thnx.