Where is the fuel pump on a 1994 sl 320 please?

Jack up the rear of the car and secure it on jackstands. Underneath on the driver’s side right in front of the axle is a protective cover held on by three 10mm nuts. Remove these nuts and carefully lower the cover out of the way. Your fuel pump and filter are located here.

Thanks for your assistance, just need to find the part replacement number. This will be the third fitted to this vehicle. I am told because I don't run it enough, hence 17,000 miles from new! Many thanks again

For your model there are cheap ones for about thirty - fifty dollars then there are factory oem ones for 90 - 300 dollars. I would not get one of the cheap ones.