The first limo we see him in post Cadillac was the Packard.
If I'm not mistaken, the next limo we see Michael in after the New Hampshire Cad ['47?], was a '54 Imperial as he was pulling up to Moe Greene's hotel.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.