Transport CanadaHigh Risk
At a glance
What can fail
A software problem in the radar sensor control unit may prevent the Active Brake Assist feature from automatically braking. The system will still show warnings, but the autonomous braking might not work.
What the fix does
Mercedes-Benz will mail you instructions to visit a dealer, who will update the radar sensor control unit software.
755 vehicles affected
Transport Canada #2019357 — full official notice →Summarized — see the official notice for exact wording, dates, and contacts.