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Recently wrapped up an Air Balance retrofit and decided to create a detailed guide for the community (see attachment). Everything's working perfectly now: the fragrance falcon pops out when you open the glove box, the screen alerts you if you remove it, you can adjust all the settings, and you get that nice scent when you start the car. Since I struggled to find good info during my install, especially for wiring and finding the fragrance hole, I figured I'd write up a guide for others taking on this project. I did this on my x290, but it should work the same for w213, w222, and x253 models, so sharing in these sub-forums as well. Enjoy
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
