Hi everyone. I have an oil leak that is traveling along the supply or return line from the transmission oil cooler (I think) on my 95 C280. I power washed the area and drove about ten miles and the only area I see fresh oil is on and around a rubber bushing and metal clamp that secures the line to the block. I actually have an identical leak on my 05' Nissan Titan so I am wondering if I am jumping the gun or is this a common line to fail?

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1981 300TD
2005 C55
2004 E500
1999 ML430
1992 400E
1998 C43
2001 SL500
1988 300SEL
1986 190E 16V
1991 190E 2.6