Soooo what's that schraeder underneath the intake on my C32

[elite_504]

As above, what is the schrader underneath the left intake (when looking into the engine bay) on my C32, when I take the clipon cover off? A/C in on the RHS, and under the cover on the left of the condensor. I know where the gearbox is, so what is that externally threaded schraeder?

 

[Dieselman]

A/c filling valve.

 

[jonathanc]

Left hand side, probably the pressure test point on the fuel rail.