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Old 04-03-2002, 11:51 PM
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oldsouth oldsouth is offline
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Join Date: Feb 2001
Posts: 610
140 Firewall Access Points

Just installed a manual boost pressure control valve on my S-350 and I want to install a boost guage in the ashtray where I can check boost pressure when I want to. I have just about ruled out trying to route a hose through the firewall, but I have found a boost pressure guage that has a transducer and transmits its data over a regular wire. I know there is bound to be a wire going through the firewall that is not used by anything in my car. Problem is finding one. Can anybody help me in this area. I know the S-500 and S-600 have more features and possible wires, so my S-350 possible would have one unused.
1995 S-350
370K + SOLD
1952 220B Cabriolet
39K kilometers + SOLD
1998 E300D
285K +
2006 E320CDI
130K +
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