Adding refrigerant to the A/C system - 2002 E320
#3
MBWorld Fanatic!
Black cap
on a schrader valve located on the metal tube that runs parallel to the engine on the drivers side .
What leads you to think you need to add 134a? Have you run the diagnostics and errors via the onboard diagnostics?
What leads you to think you need to add 134a? Have you run the diagnostics and errors via the onboard diagnostics?