FYI. Most if not all HIGH voltage transmission cables are made of aluminum. If it is good for power to the City, to your house. I really cannot see why it not good in your auto. It is the dirty contact which causes all the problem.

The posts we read in this forum are 'problem' posts. You do not hear success stories like 'I use aluminum fuses and I have no problem' post. I try to help the OP to resolve the heat problem and there is no need for me to debate with anyone on the merit of fuse elements material. You can use anything you can afford to buy, plastic, cermic, copper, bronze, aluminum, gold, silver etc. BUT keep the contacts clean.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

The issue is not whether aluminum is a good conductor of electricity. The issue is with the way that aluminum reacts with other metals it comes into contact with.

Maybe there is a good reason for that!!!

Here are a few words on galvanic compatibility:

http://www.engineersedge.com/galvanic_capatability.htm