Mine is an '83. I figured all 380SLs are the same.

The Hayg vendor said the pump I got has a range between 40 and 65 psi, which means it wouldn't meet the system pressure spec (5.0-5.6 bar, ~70-80 psi). Maybe he means this will be the pressure at the injectors. He said maybe my electrical system is causing the pump to overwork (too high voltage? which it's not). He sent a troubleshooting link and said they'd exchange it if defective. I don't see how a defective pump can put out too much pressure (unless there's an "overpressure bypass valve" inside).

I've no doubt the P/N you gave is correct. It could be the pump I pulled was replaced when previous tank work was done - it had a Bosch tag on it (and looks like the 2nd Bosch pump in the Pelican Part listing). The fuel system has been messed with - my fuel strainer doesn't look like an original - it's paper instead of fine screen.

I requested operating specs for Pelican's "5 thumb" Bosch pump (they use a different P/N notation [8-9? digits with a suffix], so I can't tell if it's a 69069).

Do you know the spec for 380SL fuel pressure (gauge hooked to output of pump/no return flow)? Maybe they don't spec this, but they should - somewhere said pressure is correlated with a certain flow rate (flow = zero when return line is blocked).