McLaren has hit back at arch-rival Red Bull's claims that the British team was responsible for Mark Webber's troubles in Melbourne.After Webber had a terrible start and then KERS trouble during the 2013 F1 season opener, Red Bull boss Christian Horner said: "You need to ask McLaren why the ECU didn't work".'WE'RE PROUD OF OUR RECORD'McLaren subsidiary MES (McLaren Electronic Systems) mandatory supplies electronic control units to every team in F1.A new unit for 2013, in preparation for the radical new V6 engine rules in 2014, caused several problems in recent winter testing.Martin Whitmarsh, the McLaren team principal, said he was "distressed" when he heard about Horner's criticism.Whitmarsh said: "We'll put our hands up if it's a fault that's derived from the hardware or the Bios. You can also inflict ECU problems on yourself by how you set it up, but I will look into it."I'll be disappointed if it is our fault because in F1, Nascar and Indycar, we've not yet stopped a car, and we're very proud of that record."Meanwhile, as McLaren grapples with its uncompetitive new MP4-28, Horner admitted his surprise that the British team scrapped the successful 2012 car in favour of a radical design."I think McLaren had a very good car in 2012. Arguably for large parts of the season they had the fastest car, so they will know their own reasons why they have chosen to go the route they have," he said.