The adaptive cruise on my Mercedes Actros artic tractor unit is linked not only to the radar sensor at the front, but is also linked to the known speed limits in the satnav mapping, and if it is switched on in, say, a 50mph limit, and I'm approaching a 30mph sign, the truck slows down to the new speed limit by itself, and then increases speed as soon as the speed limit increases again. The speed limit of the road is actually marked with not only a traffic sign on the dash but also with an arrow pointing to the correct speed on the speedo display, which changes colour from yellow to where the cruise is set under the speed limit speed, green for the speed limit, and red for over speed. The cruise is also switchable from a steering wheel button between adaptive as described, and standard, where it doesn't take any outside factors into account, it just keeps the speed at which it is set. Mercedes call this system PPC, Predictive Power Control.
Is the retrofit Leon the same, or does ACC actually REPLACE the standard cruise with no option to switch between the two, and does it factor in road speed limits as taken from the sat nav like the truck? Generic pic from google attached, not me taking photos whilst driving with 44 tonnes behind me! Thanks
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