I just re-keyed everything on the 5er to a single key using products from RV Locks and More - www.rvlocksandmore.com . They have a keyless door lock, but I used the standard Global door lock and some cam lock units. Everything was good, products work great.
TakingThe5th - Chicago, Western Suburbs
'05 Ford F350 Crew 6.0 DRW Bulletproofed. Pullrite Super 5th 18K 2100 hitch.
'13 Keystone Cougar 333MKS, Maxxfan 7500, Progressive EMS-HW50C, Grey Water System.