Sep 2, 2024Speed controlDriver assistance
The Distronic Cruise Control stops working and then will start working again several times on long trips. After research it appears if the radar doesn't detect anything in front of your vehicle for an hour it thinks it is inoperable and and shuts the Distronic Cruise Control off and it cannot be reengaged. If it detect a vehicles in front of you for four minutes or more it will reset the radar and your Distronic Cruise Control can be turned on again. This is dangerous as it requires you to follow closely behind another vehicle for at least four minutes to reset. Out west where I live there are a lot of road stretches' where you will have little to no traffic for over an hour. Mercedes needs to change this software bug and provide another method for it's radar check warning.
NHTSA ODI 11612105
Jun 7, 2024Speed controlDriver assistance
On long trips (when you need cruise control the most) the adaptive cruise control will (seemingly at random) stop working with a warning about the active distance assist and active brake assist. It has happened in all situations from heavy traffic to long distances of no other cars on the road. It stays non-functional for anywhere from a few minutes to several days. It has happened many times. The dealers are clueless. Saying nonsense like "I'm not aware of this problem." even though the Internet is filled with reports of the exact issue.
NHTSA ODI 11593062
Feb 19, 2022BrakesDriver assistanceCrash
On UPWARD slope in 4WD on icy intersection ,proceeding less than 5 mph, emergency braking as a car dead stopped at intersection on green light, hit brakes hard and brake pedal and gas pedal both engaged,, van kept moving forward,, pumped once same effect, ran in to rear of stopped car at 2-3 mph.. I was wearing work boots and gas pedal and brake pedal both at same elevation. brake pedal to close to the gas pedal.. Vehicle is a 4 wd 2500 series van. I have used van for 5,000 miles so I am used to the vehicles characteristics. Practiced a recreation a few times with same result, brake and gas pedal both get depressed upon panic hit with foot.
NHTSA ODI 11452961