audifan
A2OC Donor
Please do not use the trapped air removal on a petrol. That space is needed for fuel expansion. OK to use in the diesels but not petrols.
Earth points all over the car. Check your battery terminals are tight and the box to the left of the positive terminal is tight to the positive clamp and the internal connections are tight.
What did you use to check the battery to get a result of half full? What does a meter show the voltage at the battery terminals with the engine running?
Also get yourself VCDS, a KKL or Gendan cable and plug into a Windows laptop with a USB port. Far more directly useful information for us to help diagnose faults.
Earth points all over the car. Check your battery terminals are tight and the box to the left of the positive terminal is tight to the positive clamp and the internal connections are tight.
What did you use to check the battery to get a result of half full? What does a meter show the voltage at the battery terminals with the engine running?
Also get yourself VCDS, a KKL or Gendan cable and plug into a Windows laptop with a USB port. Far more directly useful information for us to help diagnose faults.