Dan,
yes the gauges will read correctly after the install work is done. We put the needles back where they belong and recalibration is them. usually it is about a 5-8 business day turn around...can be faster is we coordinate ahead of time with shipping and work schedule.
Christopher

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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