I'll be transiting through Munich later this month, arriving on Delta from the US and continuing on Turkish to Istanbul. I've got Priority Pass and would like to use one of their lounges (persumably the Atlantic one) to clean up and shower after the Delta flight. (The Delta lounge doesn't have showers.)

It looks like DL arrives in module B, and the Atlantic lounge is in module C. Will I be able to get from one module to the other? Any traps to avoid so I don't up on the wrong side of security?

Since I already have Priority Pass I'd rather not pay for the showers in the central area or the Kempinski spa.

Also, will I need to clear immigration in MUC, or is there a Terminal 1 to 2 transfer?

Thanks!