Speaking of cold solders I actually did the same thing to my tach amp but due to the pita of removing the silicone I figured nobody else would be interested in pictures of it. It hasn't gave me any problems since.

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k