So I picked up the S90D on 2/17. Love the car. Amazing ride quality and excellent handling until yesterday. I have regular suspension and didn't get the SAS. I have driven 700+miles so far and had no issues. My driving is on regular highway and well laid local roads that I have been driving on for years. Since yesterday I started feeling bumps while driving going on even minor depressions on the road. I had never felt them in my Model S before or even in my old Honda. Now I am feeling the bumps a LOT. Even a small depression or bump on the road that the car was handling like a champ is very rough when I go over it. The car almost shakes and the ride quality suddenly has become very rough. Has anyone experienced this before? Any ideas or thoughts? Will take it to the SC asap to have it looked at.