New Beetle L4-1.9L DSL Turbo (BEW) (2006)
Sight Glass: Description and Operation
A/C Refrigerant System Component Description
Sight Glass
If system is equipped with a sight glass, a properly charged A/C system can be confirmed when, with the A/C Clutch engaged and engine running at
1,500 RPM, the sight glass remains clear and bubble free.
‹› The mixture of R-134a refrigerant and refrigerant (PAG) oil may appear milky in the sight glass.