Hi does anyone know what this is for on the underside of the brake master cylinder on a 300tdi? it seems only the models with abs have it, is it for bleeding maybe?
you may be correct quite a few m/c have bleed nipples on them but they are normally a nipple like you would find on a caliper get some photos from under it
This is a picture of it looking up,seems to have a hex bolt in there. the reason i wanted to know is I need a new master cylinder and this bit seems to be on the abs ones but a breakers near me have one without it.