Berlin Marathon Help

Been mad a work recently just started to think about the Berlin marathon this weekend.

Just read that I have to register by 6pm on the other side of the city when my planes doesnt even land until 4pm. Going to be close!

Is anybody going at a sensible time and not arriving only hours before like me who would be prepared to collect number/chip if i email them my registration certificate ?  Im staying at the Ramada Plaza ?  Cheers D