hi my 2005 2.0 a4 tdi 60k miles has developed an aux belt squeal whilst steering at low speeds and when at full lock. theres no loss of pas fluid and no leaks around the pump or rack. from what i've read it seems that the tensioner and the alternator pulley are the most likely culprits. anyone know of any tips to narrow it down to one or the other? also is it possible to just remove the front grill and rads to get to the tensioner if it is that? i don't have a manual atm as up to now we've only had to service it which has all been at main dealer to keep up the stamp. any recommendations on a decent manual for it? many thanks for your time.