Hi I'm having a problem with the A6 2.7 TDI 2005 that the power output is high for the management system. Does anyome know if the output is adjustable or is it a new alternator. The symtoms I am getting are as follow; Engine runs fine and all warning lights go out as they should, 10 mins driving esp warning light appears, turn ignition off and it resets for another 10 mins, then returns. If I start engine even when car stands idle 10 mins and the light reappears. Help Please