I did that once on my 300TE, used the same oil as the rear suspension, because I had a five gallon bucket of it from Shell oil.

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91 300 TE 235K
93 Cabriolet 155K sold
92 300 TE 200K boneyard

I've used Uro fan clutches on BMWs, never had any issues.

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

Im pretty sure that the five gallon bucket was not a 7000 cst silicone oil if you used it for your SLS. You can buy the silicone oil at an RC hobby store for under 10 dollars.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I got mine from Toyota. I've redone at least three fan clutches and they are all still working fine after years. It is by far the cheapest way to do it.

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http://i284.photobucket.com/albums/l...aman/Fleet.jpg

Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
92 300D 2.5 Turbo
92 300TE 4Matic

You bet, my car's fan clutch with a MB star is operating sweetly with no problems after a year. Still have a bunch of the oil sitting on my shelf.

I also filled a clutch for a BMW E39 - it also is working good.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)