Sometimes the car applies the brakes regardless of the following distance.
Mar 12, 2026 at 9:34 PM
Collision Avoidance System?
2014 MERCEDES BENZ S550
CHARLESTUCK
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Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
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I would do a CAN scan first before replacing anything, but to me it sounds like the proximity sensor in the front of the car is bad. Here is a video to show you how to do the first step.
CAN SCAN - https://youtu.be/u-4syLc-ifQ
Problems can occur if:
1. Dirt or bugs cover the sensor
2. The grille/emblem area is dirty
3. The bumper has been bumped or repaired
4. Radar alignment is off
The radar may need recalibration with a scan tool and target board, or the sensor itself is bad but the scan should have a code for it. Please let me know what you find, Ken
CAN SCAN - https://youtu.be/u-4syLc-ifQ
Problems can occur if:
1. Dirt or bugs cover the sensor
2. The grille/emblem area is dirty
3. The bumper has been bumped or repaired
4. Radar alignment is off
The radar may need recalibration with a scan tool and target board, or the sensor itself is bad but the scan should have a code for it. Please let me know what you find, Ken
Mar 13, 2026 at 9:59 AM
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