How to Change the Cluster in a Mercedes C280
1. Remove the tweeter cover on the driver's side by prying off the bottom left side, then using a flathead screwdriver to release the clip on the top left side. Turn the tweeter to the right to remove it.
2. Unscrew the two screws that are exposed when you removed the tweeter cover, then release the two latches in the a/c vent to remove it.
3. Reach in through the empty a/c vent and push out the left side of the instrument cluster with your hand.
4. Insert a hook behind the bottom right corner of the instrument cluster, turn it so it catches the back end, then pull gently to pull out the instrument cluster.
5. Disconnect the two wiring harnesses on the back of the instrument cluster by pushing in on the tabs on either side.
6. Connect the two wiring harnesses to the new instrument cluster, then push it back into place.
7. Reassemble the a/c vent and tweeter cover by reversing the above steps.