Do this if Your Mercedes Displays Active Brake Assist Functions Limited

AutoScandia
3 min readApr 29, 2023

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Modern cars come with various features that not only protects the car and people, but also make you aware of certain problems in the car so that the car owners can quickly get a fix before something more bad happens in the car. You all know how various indicator lights are present on the dashboard to alert the user. You just have to know which problem actually that light mean. Not just some lights, but the dashboard also show messages which come up and gives you a text. Sometimes those messages also become hard to know about the problem exactly. In this article, I’m gonna tell you about the message — ‘active brake assist functions limited’ that come up in Mercedes.

The active brake assist

First you have to know about the active brake assist feature and then you would know about the message. If you own a Mercedes, then you may encounter this message — ‘active brake assist functions limited’. Now a day’s many Mercedes owners complain that their vehicle is showing this message and what to do. So I’m gonna discuss all these things here.

Active brake assist is a feature which helps the driver to prevent the collision of your car with other vehicles, pedestrians or other obstacles. This is a braking system that makes the car to brake during emergency to save you from accidents. Many times, drivers fail to notice the things that are very likely to get collided with the car. This happens rarely by some drivers and normally by some other drivers that are inexperienced. But such collisions can lead to major accidents, injuries to not only your car, but also other vehicles and people too. You it is very necessary to completely avoid these collisions and accidents.

The active braking system is powered by batteries. The braking system use certain sensors located at the front and rear part of the car. The sensors check the distance of the car from other vehicles or pedestrians nearby. When it finds that vehicle is very close to your car while driving, then it immediately applies the brakes partially to slow down the car. It also makes the driver alert of some upcoming collisions by monitoring the near areas of your car. So the active brake assist is a very useful safety feature which makes the driving safer.

But sometimes, the active brake assist fail to work. It fails to monitor the positions of the vehicles with respect to your car. So it also could not brake or alert you when something is about to collide. So the car computer alerts you through such messages so that you would drive more carefully to avoid accidents.

Is it good to drive when the car shows the message?

The message showing up at the dashboard is a sign that your car is not having active brake assist working properly. Malfunction of the active brake assist makes the car less safe. You can drive your car if you can control it with care. It will be better if you take your car to a nearest garage to get the problem fixed. Sometimes, the malfunction of the active brake assist makes the car go into limp mode.

What to do if your car shows such message?

If you get to know that your car showing this message, then take your car carefully to the roadside or to a safe place, then turn off the engine and ignition, wait for some time and then restart it. Many times, the restarting can create the errors and your car would not show the message again. If it does not work, then try some other method given.

Get the front grill and the top center part of the windshield cleaned, cleaning of the dirt from these parts can make the sensor work properly.

Take the help of owner’s manual to know some tips on fixing and handling the issue.

Take an OBD2 scanner and scan the codes in the computer of the car. Get to know about the root causes. You can also reset the trouble codes.

Check the battery, its voltage and the connections.

Clean the bumpers

Conclusion

If the fixes still doesn’t work, then take your BMW to a nearest mechanic to test and replace the sensors.

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