The alternator is defined as an important component of the Audi A4 which is not only used for recharging the battery but also provides power to several electrical components. Moreover, it can translate the mechanical energy into electrical energy which is stored in the battery for performing all the functions. If the alternator is failed in your Audi A4, then you will notice the signs defined in the following slide.
11. A small problem within the electrical
system can affect the functions of
its components such as:
Windshield wipers
Power locks
Power windows
Heated seats
12. So, when it is failed the electrical components
are slow to operate or stop working.