Lewis Hamilton has admitted following his final race for McLaren that he feels both "numb" and "excited" after a dramatic Brazilian Grand Prix.
Hamilton led the race until late on before he was forced to retire after a clash with Force India's Nico Hulkenburg.
His teammate Jenson Button went on to win the race and help Sebastian Vettel secure a third consecutive drivers' championship.
The 27-year-old insisted that he is leaving McLaren with a heavy heart but is relishing the challenge of driving for Mercedes.
He told BBC Sport: "I feel OK. I am happy for the team that we got a win and feeling good for the future.
"I feel numb, a little bit like I did in 2007, it is mixed emotions at the moment. Sad that we were leading and I didn't get to see through the race and also that I am leaving.
"But I am excited for the future and hopefully I will have a little bit of luck at some stage."
Hamilton finishes the season in fourth place in the drivers' standings, a whopping 91 points behind Vettel.
