I have a 1993 SL500. My fuel pumps have no power. I traced it to a controller unit behind the passenger seat compartment. Can any one tell me what is the actual name and part number? This unit is completely rusted. I cant find it anywhere..

The controller beneath the compartment behind the passenger seat is for the soft-top. Something stored in there most likely spilled, causing the rust. The soft-top control unit however, rust or no rust, shouldn't kill power to the fuel pumps.

For the problem you're having, I'd check the fuel pump relay. It's behind the right side inner trunk lining. If I remember correctly, it's the green one.