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#1
10-04-2014, 09:01 PM
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Tachometer amp missing but still working???
Ok I recently got a second mercedes for a steal. 1983 300sd in running condition for $400. Well the tachometer does not work so after doing some googling it points me at the tach amp as being the issue.
At one point I decide to swap the amp from my main car (1984 300d) but when I went to swap I found out the 84 does not have one. I have the plug for one and a cap ontop of it but the cap is empty. Yet I have never had any issues with my tachometer at all. What is going on here? 
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#2
10-04-2014, 09:09 PM
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The 84 probably uses the EGR computer to drive the tach.
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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