Small Squeak from rear shock absorber.


I have a 2016 C300 that gave me some trouble over the month.
After I got it from the dealership after month of repair.
So far the car is overall great but...
yesterday I was teaching my youngest sibling how to drive and
for the first time I sat on my rear seat. However, when my sibling breaked hard at a stop sign. The car made a squeaky noise from the rear. (It wasn't breaks though it was a different kind of a noise)
What can be the issue? I don't think its the shock absorber since when
I go into speed bumps it seems to be okay.
My car currently has 4200 miles.
Let me know.


