Over Christmas I noticed a small pool of fluid on the drivers side cab floor mat. On removing the cowling around the steering column it looks like it is possibly dripping down from around where the brake servo is (

I wiped it up and left the van for a few days to see if there was further leakage and there has been. I plan to get it over to my local VW specialist as soon as I can and dont plan on using it until it has been looked at but I wanted to ask if anyone else had experienced the same symptoms. I have had a good look at the wiki and also searched the rest of the forum but couldn't find much info.
Many thanks in advance.