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I believe 2x 10 gauge wires was the stock setup.
When I put the 115A alternator in the 420SEL I initially connected it to the distribution block.
I found that when measuring voltage at the block and directly at the battery that there was a 0.5 V drop between the two.
I moved the alternator wire so that it connected directly to the battery.
I used 0 gauge wire in that installation. Actually that's what I used in my 300D and 190E as well.
When you are idling, what load do you have on the system? Headlights? Blower? etc?
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!
(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)
82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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