Have you removed the door panels and dashboard as well? If so, now is a good time to check the operation of the A/C...especially the evaporator, while it's easily accessible.
Good time to change out bulbs, as they dim or fail over time.
Window assemblies can be lubed and inspected for wear. On the rears, the plastic window track holder is a common failure item, and costs $2 to replace. If it does fail during operation, the cable gets snarled, and you will wind up replacing the entire assembly for $150.
On door panels, tighten any inner bolts and screws you find, as they are the source of most rattles in the cabin.
If the console is out, it's easy to get that cool burlwood shifter installed. Also the shifter bushing squeaks when it wears out, so check that too.
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car