Air Conditioning and Coolant
Ford Explorer XLT
Where is the low pressure valve to recharge the AC unit in a 1992 Mercedes 190 E?
Th low pressure valve s located to the right of the site glass
(where you check your freon activity) The hose is black with a
nozzle on it and has a nipple you can check for pressure. Close to
black low pressure line a blue high pressure line