[z4_hyperorange_fan]

ZPost community,

I recently bought a 2015 Z4 sDrive35is and it's awesome: beautiful, fun, and fast.

BUT, it's a loud and rough-riding example, even for a "sports" car. I really want to sort it out to make it a comfortable daily driver. Does the community have any advice for the following issues?

Rough ride:

19” wheels and 30-series tires with M-sport suspension mean the ride is rough. I replaced the run-flat tires with non-run-flats which was an improvement, but is there anything else I can do to improve the ride? Are new struts or softer suspension bushings an option?

Rough engine idle:

BMW inline-six engines are famously smooth, but this car idles roughly. I had it tuned up, but it didn't help much. Do the engine mounts need replacement? Any other tips?

Noisy ride and squeaky interior panels:

I lubricated the interior panels with silicon lubricant, which solved some but not all of the squeaks. Do I need to remove the interior panels and reattach them? Would adding sound deadening materials behind the panels improve the noisy ride? Would a sound-deadening undercoating help?

Thanks in advance for any advice.