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  #1  
Old 11-23-2004, 01:49 AM
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Join Date: Nov 2003
Location: Charlotte, NCizzle
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W124- Firewall pass through to engine bay?

I am hooking up my nitrous pressure gauge and air/fuel gauge and i cannot find a pass through in the firewall to route the wires (Its a 400e). I have the driver side bottom dash removed but i cannot find any holes. Also, does anybody know if the light source and power source for the cigarrete lighter are 12 volt sources?
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1993 400e
Charlotte
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  #2  
Old 11-23-2004, 10:48 AM
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Location: Tulsa
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Look for a possible point of passage through the firewall on the passenger side just behind main computer box. You will see many other wires running through the firewall at this point. I had a cell phone, hands free kit mounted with the wiring running through this area.

Yes, 12 volt.
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Russell McMahon
Tulsa, OK

2001 CLK 320
1992 400se
1993 400e
2000 320ML
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  #3  
Old 11-23-2004, 11:55 AM
froghunter
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124 passthrough

On my '87 300D 124 there is a rubber manifold that passes vacume lines to the dash. It has several unused ports that can be pierced and used to gain access to the interior of cabin. Must remove instrument cluster to view its backside, and work from there. I plumbed turbo boost gauge and 500E Euro headlight controls through the firewall using this route. Not sure if 400E is the same, but maybe.
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  #4  
Old 11-23-2004, 02:06 PM
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how does the instrument cluster come out? Thanks for the replies
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1993 400e
Charlotte
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  #5  
Old 11-23-2004, 03:15 PM
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Join Date: Jul 2003
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Lets' Pull the Instrument Cluster!

Great DIY on dash removal
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Russell McMahon
Tulsa, OK

2001 CLK 320
1992 400se
1993 400e
2000 320ML
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