I'm not aware of any Luftwaffe need for 'AVGAS'?
I understand that an offer was made to lease some ATr assets to NATO's MCCE - until the cost was stated. The RAF has no AAE assets of its own it pays in excess of £1M per day under the PFI scheme. Perhaps that might change if Comrade Corbychev ousts Mother Mayhem and nationalises all PFIs?
Current Luftwaffe AAR assets are heavily used and remarkably serviceable' enjoying an excellent multi-national reputation for their work. Whether they will also use the A400M in the AAR role is as yet uncertain.