I have a 2000 E320 4matic with an engine serial number prior to the change to the updated HB. Mine, however came from the factory with the updated 08 balancer!!. Just replaced it at 95,000 kms. as the rubber was coming out. I thought the 08's were supposed to have solved the problem!! Fortunately mine has the 160,000 extended warranty so no problems at the dealer, they were great.