[By Model] For Mercedes C-Class and above, what the workshop checks first when you hear a "creaking" sound over bumps or while steering

Previously, I wrote about how to take notes when reporting unusual noises to a workshop ("what kind of sound, when, where ...
hothardware.com

Apple iPad Air M1 Owners Complain Of Creaking Noises, Call Into Question Build Quality

Speaking from experience, one of the side effects of getting older is an uptick in creaking noises coming from places they never did before (back, knees), to go along with lingering aches and pains.
notebookcheck

iPad Air 5 buyers complain about subpar build quality and creaking noises

The new iPad Air 5 does not seem to get too much praise from early buyers, as many complain about creaking noises and the supposedly "very cheap" build quality of Apple's new tablet in comparison to ...
Ars Technica

Any solution to creaking button sounds on a controller?

I just got a GameCube Wavebird controller on eBay in pristine condition. The Z button on the top of the controller works fine but makes a horrible creaking noise when pressed. I've Googled for ...