Many have reported positive results with the replacement unit from Unwired Tools.

http://unwiredtools.com/index.shtml

At one time this unit was available for purchase through this site. May still be.

__________________
Joe

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1980 300SD - 495k miles - 'The Ambassador'
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Former Family Members
95 C280
73 280SEL
90 300D
87 300SDL (X2)
86 560SEL
84 300D
80 300SD