Vehicle Questions and Answers
Welcome to the Vehicle Q&A Hub. Find answers to your automotive questions, share your experiences, and get expert advice on vehicle maintenance, troubleshooting, and more!
30935 views
6 answers
The message saying "Mercedes collision prevention assist plus inoperative" appears when the system lacks sufficient power to operate. This usually occurs after the car has been inactive for a while, or if the battery has been changed or drained. Once you drive the car for approximately 30 minutes, the message should disappear. If it doesn't, you should bring the car to a Mercedes dealership for the ECU to be reset. However, this is rare to happen, and if it does occur, there may be other underlying problems besides this issue.
Can you operate the vehicle that displays this message and how much time do we have before it needs to be fixed?
To turn off the collision prevention assist plus on a 2018 Mercedes-Benz C300, you should either let the car idle or drive for approximately 30 minutes.
Is my battery dying because of that?
Great suggestion
Could you assist me, please?