The primary purpose of cruise control in your Audi is to enable you to maintain a particular speed automatically. The invention of such an advanced feature could be considered as one step forward towards full automation. Failure of such a vital system might lead to a fatal accident that might cost you your life. So, you should be aware of the most common factors responsible for the failure of the cruise control system in your vehicle. This slide might be able to answer all of your queries regarding cruise control failure in your Audi A4.