My "owners " manual says change the timing belt at 120000. I'm getting mine done next week at 75k. Thing is, how long should one wait. This is the 2.0t. I broke one on my 91 BMW 325 which, of course required a new head. Fortunately I was able to do the work myself at home. I'm not even going to attempt the Vw. What have others experienced Jin a time line to do the belt?