Hi Jings999 - Job done. For the 307 GLX Pug 51 the pollen filter is located in the engine compartment below the drivers wiper blade and under the bulkhead. There are two plastic pins holding some insulation in place on the front edge of the bulkhead, prise these out of the bulkhead and then slide out the insulation material. Back end of this insulation is held in place by a couple of pegs. Once removed, this will reveal a long plastic box like construction (pollen filter box). Reach in and carefully pull the filter cover towards you, mine had a handle arrangement on the front cover. The filter is inside the box behind this cover. Note position and markings on this filter and then carefully pull out. Hope this helps.