Originally Posted by supermasterphil

Immigration will be done in MUC and also customs of your hand luggage. Your flight will arrive on the H level, the VCE flights from the G level! This will be signed and super easy.

Customs of your checked bags will be in VCE. Assuming you have nothing to declare, just walk through the green channel. Customs officers can detect by your suitcase label if you have originated within Schengen or not.