Impossible to help much, since you haven't even identified where the
fluid is coming from. It could be anything from a leaking connection
on a hose, to the pump or steering unit. I would say your best bet is
to take it to a good independent shop that works on MB.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.