Mercedes team principal ꩲToto Wolff says Nico Rosberg suffered a brake by wire failure at the start🐓 of the last lap which ultimately caused his turn two collision with team-mate Lewis Hamilton.

Batt🥃ling for victory in the Austrian Grand Prix race leader Rosberg defende⭕d the inside line into turn two as Hamilton attacked around the outside.

T🍌he German driver missed his turn-in poi൲nt which forced both Mercedes cars wide before Hamilton turned into the right-hander which saw the two collide.

Rosberg lost his fron🌱t wing while H🍷amilton recovered unscathed and went on to claim victory as his team-mate limped to the finish line to eventually take fourth place after being passed by Max Verstappen and Kimi Raikkonen.

Rosberg's result remains📖 provisional as he is under investigation for the incident and driving a damaged car to the finish line.

Wolff has confirmed the F1 chꦜampionship leader suffered a brake by wire failure - where he lost the full braking capability from his rear brakes - which caused him to run wide at turn two which sparked his collision with Hamilton.

"Nico had a brake-by-wire failure on the straight and defended very hard. Then seeing both cars nearly colliding is very upsetting," Wolff said on Sky Sports. "We had a marginal on the brakes if not to say completely over the brakes. We couldn't tell🦂 the drivers.

"It is racing but cars colliding it seems like d?j? vu when I'm speaking about colliding team-mates. It is absolutely not what we wanted🎐 and we just need to take the conseq💛uences now."

Wolff also explained the reasons behind Hamilton's strategy switch from a one to a two stop was to defend from Ferrari's attack with Sebastian Vettel whi😼ch ended in spectacular style when the German's badly worn right rear tyre expired on the home straight on lap 26.

"We left Lewis out because we thought 🎉the one-stop was the quicker strategy," he said. "He ꦐwas the car leading on track so he had the better strategy.

"We saw Ferrari tried to 🌳do the same 𒅌and had the consequences of it with Sebastian and his tyre failure. When we realised we had to convert it to a two-stop that is where the problems started for Lewis."