Today my 420 started making a grinding noise. I thought it was the brakes but its not. I cant figure out where exactly its coming from. Has anyone ever had a problem like this before or does anyone know what to check. The noise is coming from my front right wheel.

 

front wheels?

wheel bearings maybe?

whats the mileage and the last time you had your bearings packed?

 

Stone in the caliper?

Jack the car up and rotate the wheel and determine where the noise is coming from.

Stuart