How do I get the alternator off my 1999 2.5TDI 102BHP? I've had the belly pan off, found the alternator and removed all the wires. I can see how to unbolt it from the engine block, but how do i remove the AUX belt? I think I can see the tensioner at the top but can't see how to operate it. Is it easy (ie under an hours job) or do i take it to a garage.