I have managed to get speed sign recognition to work in Australia... I get speed signs and warning signs in the HUD. If no road signs can be read, it picks up the speed limit from the sat nav. School zones are a issue in that they always show as 40km/h no matter what time it is, but that's no biggie.
Module 13: Auto Dist. Reg
Coding
Byte 01 bit 00: traffic_sign_detection – activated (tick)
Module 17: Instruments
Coding
Byte 14 bit 06: traffic_sign_detection, Yes (tick)
Module 82: Head up display
Coding
Byte 00 bit 00: Traffic sign detection, available (tick)
Module A5: Frt Sens. Drv Assist
Coding
Byte 58 bit 6-7: 80 VZE traffic sign detection, hidden (select)
Adaptation (use Security Code 20103)
IDE 04733 Road sign detection fusion mode – change to "Road sign fusion" (select)
Module 5F: Information Electr.
Coding
Byte 24, enable Bit 6: vza - activated (tick)
Byte 24, enable Bit 7: psd - not activated
Adaptation (equipment code 12345)
ENG122227 - ENG117636
Car_Function Adaptations_Gen2_menu_display_road_sign_identification - change to "not activated"
(if activated=speed signs on map from camera, not activated=speed signs from map)
ENG122227 - ENG117637
Car_Function Adaptations_Gen2_menu_display_road_sign_identification_clamp_15_off - not activated
ENG122227 - ENG117638
Car_Function Adaptations_Gen2_menu_display_road_sign_identification_over_threshhold_high - activated
ENG122227 - ENG117639
Car_Function Adaptations_Gen2_menu_display_road_sign_identification_standstill - activated
ENG122227 - ENG117640
Car_Function Adaptations_Gen2_menu_display_road_sign_identification_after_disclaimer - not activated
ENG122229 - ENG117754
Car_Function_List_BAP_Gen2-traffic_sign_recognition_0x21 - activated
ENG122229 - ENG117755
Car_Function_List_BAP_Gen2-traffic_sign_recognition_0x21_msg_bus – Extended data bus
I'm still experimanting with this but it works well for me so far.