On my Mercedes sprinter the cause of the fan belt vibration at low idle speed was the pully on the alternator.This pully should ratchet in one direction.
The only way to clear the service light is by using a scan tool on the newer models.
1 and 313 (313 is a prime number).
313 is a prime so radical 313 cannot be simplified.
97969
It is: 334 -313 = 21
x x 313 = (x)(313) = 313x
127
313 + 406 = 719
1 and 313 - It is a prime number.
449 + 313 = 762
313 is a prime number.