Leaking coolant

I think the naming gets confused by many, basically (I think, though I'm never sure if I'm on my a*rse or elbow when dealing with VW stuff) Torx is 6 lobes and Torx Plus is 5 lobes then you add a centre pin (or centre hole) and it becomes the security / tamper-resistant version of either.

I only discovered the 5 lobe (security) version when helping a neighbour with his 2005 GM Vauxhall Astra van, neither of us have good eyes and couldn't work or why a Torx screw driver or any of his drive bits would fit and thought perhaps it was a Torx size neither of us had. So I bought that set of US Pro (Bergen) sockets as they were what I found at the time, I didn't really want 3/8" drive sockets, especially on the smaller sizes, but thought I could always knock the bits out if I wanted to. One of them was used that one time and none of them probably used again but it was a needs must at the time.