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.
General Repair Information
No components of the heating and A/C system can be serviced. Replace faulty components using original parts.
-- On vehicles with high-voltage system, switch on the "parking air conditioner" function (deactivate). Refer to the Owner's Manual.
The refrigerant circuit for the A/C system may only be discharged and opened when:
- it is necessary due to safety precautions. Refer to SAFETY PRECAUTIONS WHEN HANDLING REFRIGERANT .
- it is necessary to remove other components,
- refrigerant circuit components for the A/C system must be removed or replaced.
When performing all other usual vehicle repair work, the refrigerant circuit of the A/C system remains closed.
If it is necessary to discharge and open the A/C system refrigerant circuit for certain repair work on the heating and A/C system, this is described in the respective work procedure. Certain tools are required to discharge the refrigerant circuit. These work procedures may also only be performed by trained personnel. Refer to Refrigerant Circuit (Refrigerant R134a Servicing, Refrigerant Circuit, Working with A/C Service Station) and Working with A/C Service StationWorking with A/C Service Station .
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.