In December 2005 it was announced that he would not be returning to the DTM series to defend his title but instead would test full-time for McLaren-Mercedes during the 2006 season alongside Pedro de la Rosa. After the departure of Kimi Räikkönen to Ferrari, it was speculated that he may have been in contention for a 2007 race seat in the team alongside World Champion Fernando Alonso. However, due to the arrival of GP2 Champion, Lewis Hamilton, Paffett was overlooked for the drive.