silicon grease
 

Hi all
would silicone grease be correct to use in wheel bearing or suspension linkages ?

I think you mean silicone, not silicon, and in general "no", unless it is high temp bearing grease, and not sure if I've ever seen high temp silicone bearing grease.
On the chassis use chassis grease. Although normally you don't see chassis lube points on Mercedes, not for a long time anyways.

Silicone grease is an excellent choice for lubricating o-rings and any other rubber where we used to have to use dish soap or KY lubricants. It is safe on rubber where mineral based lubricants will deteriorate the rubber.
It is also great for lubricating squeaking rubber seals but NOT for door seals as it is difficult to wash out of cloth if it transfers to your clothing or interior material.
For treating door seals try to locate Gummi Pfledge... BMW no longer produces it but 1Z Einszett still does.
Silicone grease is not meant to replace specialised lubricants like wheel bearing or chassis grease.

Thanks for the valuable information. Got an e-mail advertising OKS silicone grease for automotive applications and wondered if it was also applicable for vintage model greasing points. (W.110,111 108 ) . These models have sixteen greasing nipples on the front and rear suspension .I believe 1971 would be last year for MB models to have suspension greasing points .
regards

I don't know of any silicone grease manufacturer that okays their product for automotive wheel bearing or chassis lube. Nor have I heard of anyone trying it for that application.

Silicone grease grease is best used in body applications, such as window runners, wiper motor gears, power window gears, etc., where the parts see light duty and may be exposed to some environment.

Compare a tube of silicone grease with a can or tube of either of the two mentioned which should even more fully answer your question.

There truly are reasons for the differences.

From the product I use from Loctite:

"* Seals, Waterproofs, insulates. Dielectric Grease, O-Ring Lubricant. Part No. 51360 . Canadian Food Inspection Agency approved, UV resistant.

Multi-purpose lubricant stops sticking, friction, squeaking, and binding of moving parts. Non-gumming. Will not mar paint, rubber, or plastic surfaces. Waterproofs and electrically insulates. CFIA approved.
* Seals, Waterproofs, insulates. Dielectric Grease, O-Ring Lubricant.

Colour- and odour- less, non-toxic valve and packing grease suitable for lubricating plastic and elastomeric components (e.g. valves and joints in hot and cold water systems). May be used to assist fitting of "O" rings, spark plug boots, battery connections, trailer connectors."