was on motorway last night when my oil pressure light came on and started beeping at me.the car lost power and went to 60mph.I pulled over and phoned an audi mechanic i know,he said the car had put itself into limp mode and to drive home carefully.The 10 mile trip home resulted in my turbo i presume making some very random noises,the car jerking,puffs of grey smoke and loss of brakes. the engine still runs and sounds ok but the turbo sounds terrible.Any ideas? i know now i shouldn't have driven it and advice was bad!!

 

Have it scanned for codes. That'll be your first step.

 

Check it by a car code reader.You should know what has happened to you car.
Or you can put you car into the car repair shop but it may cost you much money.

 

Diagnostic Trouble Code Table
You can compare with the PDF