How do you open a golf 4 petrol cap when switch is not working?

If the petrol cap switch on a Golf 4 is not working, you can manually open the fuel cap by locating the emergency release cable. This cable is usually found in the trunk or near the driver’s seat, often near the fuel door. Pull the cable to release the cap. If you cannot find the cable, consult your vehicle's manual for specific instructions or consider seeking assistance from a mechanic.