(See post above) yes those are their instructions. My buzzing stopped immediately. I then drove the car to the freeway and took it up to 100mph and back down. I then drove on surface streets with different speed limits. Then I took the car home, parked it in the garage and let it idle for 30 minutes. I have to assume that the CCU needs to relearn the TA.
Anziani
'93 300CE 198K
'95 E420122K