Always good to check suspension and under side of the car. They can look for damage, loose heat shields etc. This is part of their multi service checks. If time for oil change, have this done and they can check over.
Hard to ask for more unless you have an issue.
Now start modifications!
I am hoping some parts such as bushings are showing some tears by the end of my warranty, otherwise I believe their default standpoint would be 'if it ain't broke, we ain't fixin!'