Purchased a 2000 Beetle TDI Auto trans. I have no idea when the timing belt and pullys were changed and the tensioner pulley bearing just froze up and there is 106064 miles on the bug. Do you think it is a good time to change belts and idlers. Also noticed there are no shields under the engine and trans, am planning on a long trip this summer to Reno, NV then to AZ, and to the Bad lands of SD. Looking to install shields to prevent damage while on the trip. Any help would be appreciated.