Wolff warns against engine war

Mercedes motorsport boss Toto Wolff has warned against the serious financial consequences for Formula One of a "gloves off" engine war.

The sport is again in crisis as Marussia went out of business, Caterham are on the brink of following suit and three other teams in Sauber, Force India and Lotus are fearing for their futures.

But the battle lines are being drawn when it comes to the development of the current power-unit systems which would result in an escalation of costs.