I can advise for mine - a 112cdi manual transmission. It is on the gearbox housing accessed from underneath the vehicle. Look for two plugs on the gearbox housing facing to the right. You will need a 17mm allen key. There are two plugs, one above the other a few inches apart. The bottom one is a drain plug and the top one is the filler. Add EP 80 gear oil until it flows out of the filler plug hole. If you are changing the oil check you can get the filler plug out before removing the drain plug.
Trevor, January 2009
