The dealer is not being difficult. In Massachusetts, there is no such thing as a "temp plate", "transport plate", etc. You can not drive a car off the lot in MA without permanent plates attached, unless you can get your own temp plate from your state DMV. Another option is to bring plates with you from another car and use those to drive it home, but you'll need to make sure that you are legal to do that in your state and that you are also insured while doing so.

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2013 BMW 335xi Sedan
Estoril Blue / Black Leather
6MT, M-Sport, Premium Pkg, Cold Weather Pkg, Dynamic Handling Pkg, Tech Pkg, HK Sound, M Performance Exhaust, M Performance Power Kit

Former: 2011 335xi Coupe -- 2009 MCS JCW -- 2006 MZ4 -- 2002 325i -- 1997 318ti -- 1991 318i