if it vibrates now at original position, i would try it with the factory marks lined up, cant hurt and that is the way it is supposed to be lined up. I would expect any diff in the way it was originally balanced can throw a vibration at speed.

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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red