More info. It is definitly hydraulic oil, the reservior is almost empty. There is a hose coming up from under the front of the engine that turns toward the rear and attaches to a metal line going out the back of the engine compartment. The outside of the hose shows signs of cracking. Could this be my culprit? Is there a certain spec. hydraulic oil I must use to replenish the reservior? Should it be available in a local parts store or is it a dealer only item? Thanks in advance...

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1999 E320 (gave to daughter) 250K
1994 F150 (may be the end of its road) 240K
1989 560 SL (Reassembly after paint job) 160K
1986 560 SL (deceased., gave it's life protecting my wife)
1988 300 TE (departed)
1994 945T (still running strong with an upgraded cam) 349K
1986 242Ti (deceased)
1968 GT500KR (under restoration)