[davidmct-M3]

First motorway drive in UK in M3cx. Going over cat's eye's on lane changes at motorway speeds gives a distinct thump/bang from the rear suspension.

On pickup dealer confirm shipping stops removed. Looking at the rear suspension through the wheels I see yellow material at the top of the shock.

Anyone else getting this?

What should rear suspension look like with wheel off?

Also clearance at the back is much less than front from wheel to arch.

Thoughts welcome