The older diesels (1.5L, 1.6L, 1.9L through the A3 TDI) had a small hole in the inner cover behind the pulley. Simply use a punch and a pop with a hammer and the pulley will jump right off...done hundreds of them! Very early A4 New Beetles had this hole there, too, but then Volkswagen did away with them and came out with that puller tool. I like the old way, so I made a jig to place a hole through the plastic cover and pop them off with a punch. Quick, easy, and the next time the hole is already there! The VOA service info (VESIS) shows you how to do this.