Where do you live. there is a mobil person here in SAN DIEGO,CA that just fixed mine for 60.00 including parts. I think he charges 15-20 dollars extra to remove it from dash.
He is retired and knows his stuff. takes him 20 minuites after it is out. Also recalibrated the speed right on the money.Upto 100 MPH
I think his price was 48.00 plus parts with it removed.
2 year garantee
Thanks
Rich

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88 300E White, sold 9-04
88 190E Black 2.3 sold
90 300CE White, Grey sold 12-24-04
92 400E White,Grey Sold 5-06
90 300CE 91K Signal Red,Black Sold 2007
1989 300CE Smoke silver,Tan Sold 1-08
1993 300E 3.2 M104 motor
1991 300CE White,Grey
1994 E420 beautiful car,gone to new home
1994 E320 Smoke an Parchment.Beautiful car