[Vwdiesel] 2003 Jetta R134 Low Side

[Val Christian]

Gang,

I have a 03 Jetta TDI, which is getting anemic in the 
air conditioning department.  I attempted to connect my 
134 manifold set to the car today, with no luck.  The high
side works fine, but the low side won't stay on.  The VW
adapter nipple appears to have a hex machining to it,
which allows the SS balls in the quick disconnect to 
pop off.  

I give up, does VW have different low side adapters to force 
one to buy a VW tool to service the AC.

Has anyone else encountered this?

Thanks.

Val