High Beam Assist Unavailable
Thread Starter
Newbie
Joined: Mar 2020
Posts: 13
Likes: 0
From: North Carolina
2016 C300 4MATIC
High Beam Assist Unavailable
Did a little bit of searching, but didn't find a lot. Wife had this message yesterday. Checked codes, had one for the left headlight actuator and communication to the camera. I reset them to see if they'll come back. Factory warranty just expired, now we're into the CPO warranty. Looks like the headlight assembly should be covered if that's the issue.
Thread Starter
Newbie
Joined: Mar 2020
Posts: 13
Likes: 0
From: North Carolina
2016 C300 4MATIC
It will let you activate it manually, but the auto function doesn't work. Codes states B284D7 "The actuator motor for the light distribution has a malfunction. The actuator is blocked." I'm assuming this is the headlght itself. Also has error UI20B9 "Communication with the control unit 'headlamp' has a malfunction. The system function is restricted." Should be covered under the CPO warranty.
Last edited by bubbasuwannee; Aug 31, 2020 at 12:04 PM.
