I have a leak at the gasket which meets the pump; i removed both torx bolts holding the reservoir to the engine (E10 and E12) and loosened the hose clamps. However, there is a C shaped brass clip, inserted with the open end facing the passenger side, holding the end of the reservoir to the pump. Does anyone know how to remove it? Do I need a special tool? Thanks. Car is 1999 clk320.

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)