A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,417
IIRC MUC is divided into two areas/concourses: basically LH and partners versus all other airlines. I'm not sure they're connected airside, so that might affect your ability to use Napcabs.
It woulld help to know the airlines, cabin class (presumably coach), and any elite status or lounge access cards such as PP you have.