My '88 300E does the same thing. After reset it rolls to .9 and clicks, I've found that if I push the reset button in and hold it till the milage rolls over to 1.0 it works fine. I've had the thing rebuilt too and it still sticks and clicks at .9 so save your money.
2000 E55 AMG
1970 280 SEL (for sell cheap)
1959 Alfa Romeo Giulietta Spider Veloce