I already did a major audio system overhaul: McIntosh head unit and amps, Focal Speakers, lots of sound damping material. The sound is extremely sweet... I'm putting the finishing touches on it this week. I installed a Sirius system but already cancelled my subscription because the sound quality was inferior to FM.

I'm constantly on the hunt for performance upgrades but all seem very expensive for the bang. I plan to look into adding the larger AMG SLK32 brakes (admittedly because they will look cooler - I probably won't drive the current brakes beyond their limits).

I'd like to see the premium floormats since the stock ones seem low-qual since I already have heel marks wearing into the driver's side mat.

Stock Michelin tires are not run-flat - there's just a can of inflating goo in the trunk.