Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Connection Points Of Refrigerant Lines, Detaching And Assembling
Special tools and workshop equipment required
- Engine Bung Set:VAS6122
Loosening
- For all the following work, immediately close the open lines and connections with clean plugs from the Engine Bung Set:VAS6122 .
Vehicles with High-Voltage System
-- Switch off (deactivate) the "parking air conditioner". Refer to Owner's Manual.
-- Switch the ignition on.
-- Initiate the basic setting of the A/C system using the Thermal Management Control Module -J1024- and open the electric valves using the routine Refrigerant Circuit, Extract, Evacuate and Fill in the Vehicle Diagnostic Tester .
-- Switch the ignition off.
Continuation for All Vehicles
-- Depending on the connection point, remove the components that hinder accessibility.
-- Discharge the refrigerant circuit. Refer to Refrigerant Circuit or Working with A/C Service Station .
Danger of frostbite due to refrigerant coming out under pressure.
Frostbite on the skin and other parts of the body is possible.
- Wear safety gloves.
- Wear protective eyewear.
- Evacuate or drain refrigerant and open the refrigerant circuit immediately.
- If more than 10 minutes elapse after extracting or draining the refrigerant and the refrigerant circuit was not opened, extract or drain the refrigerant again. Pressure develops in the refrigerant circuit due to evaporation.
-- Remove the bolt -A-.
-- Disconnect the connection points for refrigerant lines -B and C-.
Assembling
Install in the reverse order of removal while noting the following:
-- Thoroughly clean the refrigerant lines around the connection area and check for damage.
-- Replace the O-rings -D-. Refer to the Parts Information for the different versions.
-- Coat the O-rings -D- lightly with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
-- If equipped, check the alignment pins for damage and correct seating.
-- Pay attention to the different bolt tightening specifications -A-.
-- Check the routing of the refrigerant lines after attachment. They must be inserted in the provided brackets in a tension-free manner and must not come in contact with other components.
-- Reinstall the removed components in the reverse order and reattach detached components.
-- Evacuate and charge the refrigerant circuit. Refer to Refrigerant Circuit or Working with A/C Service Station .
Vehicles with High-Voltage System
-- Switch the ignition on.
-- Initiate the A/C system basic setting through the Thermal Management Control Module -J1024-, and activate the power-controlled valves through the stored routine Charge/flush the refrigerant circuit stop routine using the Vehicle Diagnostic Tester .
Continuation for All Vehicles
-- Operate the A/C system after charging the refrigerant circuit. Refer to A/C SYSTEM, STARTING AFTER CHARGING REFRIGERANT CIRCUIT .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.