The mercedes g550, or g55? I know it has a rear view camera but I was wondering if it has parking sensors on the side front or back like the range rover spor?

Yes, called "rear park assist". It is associated with the rear camera. I think it is only on the rear bumper, not the front

From their website:
"Rear Park Assist. Sensors in the rear bumper detect nearby objects within the system's field of view. Audible signals and an illuminated display help you back up with greater confidence."

Click on Parking & Braking Systems on the picture:

http://www.mbusa.com/mercedes/vehicles/explore/safety/class-G/model-G550