Traffic Sign Assist not working - UK import to NZ
The car supports Traffic Sign Assist and the options are all active. However, it shows up on the dash and HUD if I select that option as a blank red circle instead of the red circle and the speed limit. I have driven NZ model cars where the system works - so it is supported in NZ. Our traffic signs are the same/similar to UK/Europe street signs (red circle, etc.).
I have seen conflicting information about whether the system uses the cameras and then the nav maps (or whether the maps are only needed where there are different types of traffic signs, e.g. in the US). In any event, I have upgraded the nav maps to NZ versions.
Any thoughts?
Thanks in advance
The car supports Traffic Sign Assist and the options are all active. However, it shows up on the dash and HUD if I select that option as a blank red circle instead of the red circle and the speed limit. I have driven NZ model cars where the system works - so it is supported in NZ. Our traffic signs are the same/similar to UK/Europe street signs (red circle, etc.).
I have seen conflicting information about whether the system uses the cameras and then the nav maps (or whether the maps are only needed where there are different types of traffic signs, e.g. in the US). In any event, I have upgraded the nav maps to NZ versions.
Any thoughts?
Thanks in advance




My own US spec 2019 C63S (same electrical architecture as the W213) went through a region change, but via the official channels. I did European Delivery, taking delivery of the car in Germany. The factory programmed everything for the EU region including the navigation maps, so traffic sign assist etc. was all working properly. Once the car arrived at the US VPC it was reprogrammed for the US region and the NAR maps were loaded on it. While in Europe, it was sort of in a hybrid region configuration, though. It was probably a special region for ED cars. It showed temperatures in Fahrenheit and pressures in psi, but all the driver assistance systems and the navigation was programmed for Europe, with the exception of the Mercedes me services not having been activated. Those only got activated once the car arrived at my US dealership.
Last edited by superswiss; Nov 8, 2021 at 12:47 PM.


