Volkswagen Polo Service & Repair Manual: A/C Compressor, Replacing

Refrigerant Still in Circuit

Discharge the refrigerant circuit. –  Remove malfunctioning component, flush with compressed air, collect escaping refrigerant oil. ...

Flushing Not Necessary

  Note For vehicles with an electrically-driven A/C compressor, de-energize the high voltage system before removing the A/C compressor. Refer to &# ...

Other materials:

Tires, Dismounting, Wheels without and with Tire Pressure Monitoring System
If equipped check the tire pressure monitoring sensor with the vehicle diagnostic tester and if necessary replace.   Note When cleaning disc wheel (rim), the tire pressure monitoring sensor (if equipped) must not come into c ...

Leaks or Internal Damage, for Example Noises or No Output
  Note For vehicles with an electrically-driven A/C compressor, de-energize the high voltage system before removing the A/C compressor. Refer to → Electrical System Hybrid; Rep. Gr.93. –  Dischar ...

Restrictor
  Caution Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the system. Only use tools and materials approved by the manufactu ...