Found a torn diaphragm on my '84 300td wagon and upon inspection I decided to repair and it was successful! I carefully removed diaphragm from pod stalk, cleaned off grease with solvent brush and mineral spirits and then carefully joined the two sides of the crack together with forceps and tape. I painted on black tool dip (stuff you dip tool handles in to rubberize -I have used this stuff for all kinds of weird repairs!) and then let cure for 4 hours. Vacuum is now amazing! Door lock flies up and down -previously, it would pull vacuum in the down position as the diaphragm folded back on itself and self sealed -when pushed up all vacuum lost as diaphragm crack bled off air. Note: Push diaphragm back on stalk carefully as diaphragm is still fairly delicate and use as synthetic grease on stalk and diaphragm lip to assist sealing capability. Hope this helps others -btw, new diaphragms may be purchased for 6.00 each from George Murphy at perfanalysis@comcast.net Good luck!