So my 110 200tdi leaked all of its brake fluid out in my drive way. I was heading out of town for work the next day so I drove it over to a shop down the street thinking it was a hose. The guy at the shop said it appeared to leak out of some kind of pressure valve. He said he can't get a good pic of the part. I know this is half a$$ information but does this ring a bell to anyone. I also have read about people using DOT 4. The cap on my reservoir says use DOT 3 only. I don't know if this is enough info for anything but speculation, but I'm out of town and thought I would just get any thoughts. I sent a pic of a "G valve" but that isn't the part he said. Thanks for any advice!