(49.6 in) 1768 kg (3898 lb)   The  Mercedes-Benz SLR McLaren  is an  Anglo - German   supercar  jointly developed by  Mercedes-Benz  and  McLaren Automotive , built in  Portsmouth  and the  McLaren Technology Centre  in  Woking ,  Surrey ,  England .  Daimler AG , owner of Mercedes-Benz, also owns 40% of the  McLaren Group