W140 bumpers
 

On the S class bumper skins, is there a difference between the ones with parktronic, or the ones without?? As well, what are the differences?? Will it effect the installation?? Would the one with parktronic be hard to make to be w/o parktronic??
The dealership wants $1500 for a bumper skin w/o parktronic, and napa wants $560 for one with. That's what makes me ask.

My guess is that the parktronic bumper will come with the sensor holes pre-drilled in it.