1. So as you can see, the speedometer is not working properly, not quite sure how and why but it's showing a different speed on the digital readout and the analog gauge.

2. The center fill speaker is making a buzzing noise when I am playing any sort of music, especially with talk radio, it's equipped with the Logic7 system.

Thanks for any help.

 

central gateway issue.
instrument cluster issue.
center speaker blown. replace.

actual values are what you. Some MB diag equipment.