Had this on my previous car, a 2000 BMW E46, but on inspection of the shocks, I could not see more than a faint covering of fluid mist under the rubber sleeve. The "bounce test" worked ok on all 4 corners. I inspected it and did a bounce test regularly with the normal services, and it never got any worse. So I did not worry about it for 2+ years, and it is now sold. With a VW Golf MK7 replacing it !