On vehicles that have heated front seat models, a heater pad is fitted on the seat back and the seat cushion. The replacement of either of the two heater mats will require the removal of the upholstery, the original mat, the placement of the new mat, and the replacement of the upholstery. Removal and installation of upholsteries demand a lot of skill and experience to execute successfully, so it is better to leave the task to a dealer of VW. Practically, it can be extremely difficult to be a home mechanic and do the job without ripping up the upholstery.