Thanks for the reply. Guess i won't hold my breath. Think this forum is getting into my brain, but with all the talk of H/B failures on v6 engines, i get a little crazy. My 1999 C280 sport with 19k runs out of factory warranty the 23rd of this month. Wish i new when the updated balancers went into effect. My car was manufactured late April of 99. Again thanks for the info Dr. Diesel