Greetings,
I am trying to identify this device. I am assuming it's an electric fuel pump. I have searched for anything that looks like this and I haven't found it. I have looked on a Benz Dealer parts website but it shows the pump and filter grouping. This is from a 1991 350SD behind the right rear wheel obviously where the fuel pump would be.

Thank you,
Kris

Those look like hydraulic lines to me. Have you traced where they go?

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Does this 350SD have ASD? Maybe the first US spec SWB 126 with SLS that I've heard of? There isn't a factory electric pump on these cars. No fuel supply or return lines that small either.

Sixto
83 300SD
98 E320 wagon

I'm guessing that's for the ASD system since there's a wire going to it. The rear SLS system is hydraulic only.

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

I haven't traced these lines. Yes, this car has ASD.

Thanks for the replies,
Kris

Then two lines route to the tandem power steering/hydraulic accessory pump and the third goes to the differential.

Sixto
83 300SD
98 E320 wagon

Looks like it has an SLS type accumulator on it too. I'd venture that by now it's bad and at the least needs a nitrogen recharge.

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.