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- Fig. 1 Engine compartment: Coolant expansion tank
Applies to Audi A3s: with plug-in hybrid drive
Your Audi A3 has two separate coolant expansion tanks:
-A-: Expansion tank for combustion engine and electric motor.
-B-: Expansion tank for high-voltage area.
Always check the coolant level in both expansion tanks -A- and -B- using the external markings as a guide.
Please read the information on ►Link before topping up the coolant in expansion tank -A-.
If the coolant level in expansion tank -B- drops, please contact a qualified workshop without delay WARNING!.