Well, I couldn't find a data sheet on the 'net, so I'm doing this from memory. My memory is NOT what it used to be, so don't quote me on any of this.
I'd bet that Timken loads won't be very good if it was rated at all. I'd bet it's never seen a Timken test as silicone based grease like Sil-Glide just isn't made for bearings - it's primarily made for lubricating non-silicone rubber. (And some silicone rubbers are amazingly silicone oil/grease resistant, as was brought up in response to another silicone rubber post I'd replied to.)
Should be fine for your rubber bushings, but I'd see what VW recommends for the application to be safe. My opinion is that bushing service isn't that stressing on grease.
I cannot find a compatibility table, but I'd guess that it would be okay on nylon as well. Again, I'd check with VW and see what they recommend. Do they recommend a silicone grease?
later,
b