Perform a Leak Detection Test on a Refrigerant Circuit That is Filled with Refrigerant:
-- On vehicles with a high-voltage system, switch off (deactivate) the "auxiliary climate control" function. Refer to the Owner's Manual and Infotainment/MMI Operating Manual.
-- Switch off the ignition.
-- Start up the leak detector in line with relevant operating instructions.
-- Always hold the test probe underneath the suspected leak.
Depending on the model, leak detection is indicated by an increase in clicking rate or a warning tone. Refer to the Leak Detection Device Owner's Manual.
NOTE:
Currents of air quickly disperse refrigerant gas. Drafts must therefore be avoided during leak detection.
Refrigerant gas is heavier than air and will escape.