Original Mercedes Benz:
FUNCTIONS:
1 Connect the wheel hub/steering knuckle to the vehicle frame or chassis
2 Maintain proper wheel alignment and stability
3 Control the up-and-down movement of the suspension
4 Help absorb road shocks
5 Improve steering control and handling, especially on rough roads or during turns
It works together with components like the ball joint, shock absorber, and lower control arm to keep the wheel stable and balanced while driving.
WHY YOU MUST REPLACE IT:
A faulty upper arm can cause:
1 Uneven tire wear
2 Vibrations while driving
3 Poor handling or loose steering
4 Knocking/clunking noises from the suspension
5 Vehicle pulling to one side
6 Unsafe driving conditions, especially on rough roads
Replacing it helps restore proper suspension movement, smooth driving, and overall vehicle safety.