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Working on vehicles with start/stop system > < Procedure before opening high-pressure section of injection system

A4 Mk3

Working on the cooling system
Working on the cooling system
When working on the cooling system note the following warnings:
  WARNING
Hot steam/hot coolant can escape - risk of scalding.
t  The cooling system is under pressure when the engine is hot.
t  To allow pressure to dissipate, cover filler cap on coolant expansion tank with cloth and open carefully.
  Caution
Overheating can occur if the filler cap is not fitted properly.
The filler cap must engage positively and audibly when it is closed.
   

Working on vehicles with start/stop system > < Procedure before opening high-pressure section of injection system