I know you have probably checked this but is the car stood on perfectly level ground, 35mm over the length of the car is not much, it could be the ground slopes slightly causing the suspension to dip on one corner?? My roadster did that on our drive, it was the drivers side rear that was compressed, I thought I had a suspension problem, I moved the car onto the road (flat surface) and all was OK.
When I had my Aero there was a slight whine noise (more of a hum) from the rear, sounded like the rear differential, when the rear tyres were changed it went away, as the tyres wore it came back, I presume it was the noise from the tyres as they wore down, it was checked by the dealer and no fault was found. (he couldn't hear the whine).
Good luck.
Ian
Last edited by exbiker; 26/07/18 01:34 PM.