I've recently purchased a W211 E63 Estate in the states. To my understanding none of estates in North America have parktronic (weird, right?). I've been looking for a tutorial for wiring the rear parktronic sensors. I image the front should be the same as the W211, but I'm nearly lost for the rear. Does anyone have the part number for the rear estate bumper, or rather, this piece (it falls below the bumper)? I've also been looking my damndest for someone retrofitting a W211 estate with no luck :-(

I'd appreciate any help!