To learn Marvin Pontiac - Now Im Happy chords, focus on the sequence of these chords: Bm, E, Bm, B, Abm, B, E, D, E, D and Bm. Set your pace at 42 BPM initially and then sync up with the song's BPM of 84. With an eye on the song's key Db Major, set the capo that best suits your vocal range.