JCD

I am sure the ball bearing does the trick, but it is a all or nothing solution. Check out this web sight:[URL=http://www.mercedessourse.com]
and take a look at "do-it-your self Kits", you will find a "123 early climate control conversion kit". All you guys with ball bearings may like to switch to this so you can have greater control over the heat system. Just a thought. Take care.