same problem, different car (300E), the fix is 5 bucks canadian.

first order of repair is to isolate where the leak is coming from. there are actually only three sources - one, from the ps cannister (i changed the rubber gasket - 5 bucks), rubber hoses - upper and lower, and connectors and fittings. tightened all connections and presto no leaks.

i too struggled over replacing the ps pump since it leaks and my steering made a groaning sound while turning at low speeds.

hope this helps, cheers!!

__________________
joel

Prayers bring forth enlightenment.