My car never had this mod done but I read about it before . What the mod is is adding a fuse outside the fuse box and splitting the factory C circuit. As I remember it a new fuse holder that sits on the fender well.

The purpose is to have less current run through the Blue fuse in the fuse box and let it (blue fuse) run cooler. I've always wanted to do this but never have. Ive never used the ceramic fuses either, so maybe this is all I need to do. I'm not sure. I oiled my fan and brushes look good. They are like 1/2" long and seated well)

Who all has done this Mod I'm curious. (not the ceramic fuse but splitting the circuit to reduce the current through the Blue fuse for the AC that is in the fuse box)

Thanks

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1982 300SD

Factory AC Circuit, a typo saying C circuit. Sorry.

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1982 300SD

If i remember correctly, the stock fuse couldnt handle the load of the acc system so mercedes fix was to add an exterior fuse strip that is rated at 30amp instead of using the fuse box fuse that was rated at 20 or 25amp. The fuse box is totally bypassed. They didnt need to "split" the current. They needed to use a more robust fuse.

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VegStew
1983 300SD 70,000 WVO Powered miles
1990 300D In driveway with Head Off - Cracked

I just performed this modification utilizing Mercedes parts and added an external 30 amp fuse holder with 30 amp blade fuse to my blower motor circuit on my 85 380se. Mercedes did this starting mid year 86 on all S class sedans. My mid year 86 300sdl had it installed from the factory. I posted the procedure a few weeks ago. Search under my name and I described the part number and the procedure to follow. It works very well.

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John
1986 300sdl
1985 380se

Was the purpose of this 30A added external fuse to take the load of just the Motor; ie "Split the Load", or was it to take the entire load of the AC circuit? I was thinking it was there to just take care of the Motor Load and leave the other loads in the normal fuse box. I need to do this so I want to learn now.

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1982 300SD

http://www.performanceproducts4benz.com/product.asp?pf_id=P54-280&dept_id=5632

Brain,

U rock!

Thanks!

Steve (that's a good price too!)

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1982 300SD

As a note........I would prefer if folks bought parts from Fastlane, but this specific part is not available.