Tapping the dash does not seem to do the trick. Just driving down the road and letting it "do its thing" seems to.

It has occured to me that this may have been a common problem with these model year cars, although it seems that people that own Merz would not have stood for such fickle problems and would have demanded a fix from the dealers considering how much they would have paid for the cars at the time.

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Norm K.
'97 E420 Sport
'06 E350 Sedan
'67 Mustang Coupe
'70 F-250
'15 VW Jetta