Audi A4: Starting and driving

 Bulkhead

Overview - Bulkhead 1 -  Lock Washer 2 -  Heat Shield Overview. Refer to → Chapter "Overview - Heat Shield". 3 -  Pass-Through For coolant lines Can be replaced only with the heat shield Equipped on some models 4 -  Seal For the plenum chamber bu

 Finding Leaks via Vacuum Test using A/C Service Station or Nitrogen Pressure Testing

Vehicles with a High Voltage System (Hybrid Vehicles) Read and follow all of the supplemental warnings for all work performed on vehicles with the high voltage system. Refer to → Chapter "Warnings when Working on Vehicles with High Voltage System" and → Electrical Equipment;