I had a rear rattle on occasion with small bumps, I was convinced it was a defective shock but when the dealer looked they said it was fine. As soon as I swapped to RS rear shocks, I haven't heard the noise since....
As far as the front pop, I get it in reverse with the wheels cranked one way or another maybe twice a month. Been that way since new. Doesn't matter if it's flat pavement, wet, snow, hill, etc.... Even after swapping to new endlinks, SS endlinks, and tightening everything down with the Eibach install, no changes..... Never bothers me but always been curious what it was. When I last researched it on here, some other dealers had told owners it was due to a slight shift in control arm because the frame/bushings are a slight oval shape on these cars. Haven't got a clue if that's true but makes some sense I guess.