With access tight in the engine bay the Volkswagen Audi Group have designed the front end of certain vehicles to slide forward giving more room for Cam belt & engine timing servicing These tools are used through the front panel allowing the front panel to be slid forward & held in the service position Three sizes are available 17mm x 2 OEM 3369 Popular on many engines 8mm x 2 OEM 3411 Popular on Passat 19 TDi PD & 1620 Sharan 19 TDi PD 10mm x 2 Recently introduced on some of the later models