Other than driving on the right, another car complication in the later years was the unseemly habit of the IRA targetting cars bearing BFG plates ..... these were nasty tin ones with white letters/ numbers on black.
So "British" plates, with entirely spurious British reg. numbers were issued, which led to the unlikely spectacle of tens of thousands of apparent British tourists swanning around Germany, concentrated near the bases. Today's Brit newspaper [from the YW or the Mally or whatever] tended to give the game away ..................................
I still have the many plates issued to me: we had to destroy the old ones but I destroyed one of each pair to show willing.