While you are not legally allowed to have a radar transmitter/jammer on your car, Audi has an option called "side assist", essentially a k-band radar transmitter on each corner of the Q7. Which means that should you find one in the boneyard, or visit the parts counter, you could easily acquire such a device...........for safety purposes of course.

Audi SUV has something called "adaptive cruise control" that transmits radar out the front end.

Infiniti has a "preview braking" option, that sends out laser instead of radar. Disadvantages are: it also bounces off signs, trucks, buses, just like the laser that cops use...........and may find it's way back into your OWN
radar/laser detector.......as well as into the cops devices.

Disclaimer: The above info was intended for entertainment purposes only, and for off-road use only.-Bob