Pop the center cap/airbag unit off (two bolts behind the wheel). Carefully disconnect the airbag wire. Use a 24mm socket to remove the center nut and pull the wheel off.
Reach behind and ensure the speaker wires, clock wires, and airbag harness are all free. vw polo 6n dashboard removal updated
There are usually two or three 10mm bolts located under the scuttle panel (where the wiper motor sits). You must remove these to release the dash from the firewall. Pop the center cap/airbag unit off (two bolts
Reconnect the instrument cluster and battery to test all lights and switches before putting all the trim back on. If you'd like more specific help, tell me: vw polo 6n dashboard removal updated