When Re-gassing certain Fiat vehicles, caution and care is very important, as you can see from the images below (taken on a Fiat Stillo) there is a third connector (port) that can be easily mistaken for a low pressure air conditioning port, this port is actually part of the fuel rail and connecting to this with the A/C machine will cause serious damage to the machine its self and possiby the car as well.
As you can see from this first image, the 3 ports are very close together, although the Low pressure port and the fuel rail connector have different colour caps, it could still be an easy mistake to make to connect to the wrong one.
Looking at the second image you can easily see how a mistake can be made if caution and care is not taken when re-gassing these vehicles.
