Usually the low pressure hoses will leak at the clamped fittings. The hose needs to be replaced. The other very common leak on these is at the small hose that connects the PS reservoir to the pump. Tech only repair. Hard to do. Specific clamps and hose size!
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM