I did this few months back, mine's a B5 ATW engine so not sure about your B6 but on ATW it has to come off. Reason being, the metal plate that holds the snub-mount covers few front bolts of the oil pan. This job is a major PITA, Engine was jacked up as far as it could go, subframe off from front and, rear loosened as far as it could go, trans mounts off and STILL had to have another person to pry the subframe down while another maneuvered the pan out, getting it back in is harder.