Thank you VERY much Sebastian, for your information.
Now I know I have the right plug.
I got this one from another Plus-friend here in Sweden, but first I didn't believe the V.A.G-employee had sold him the right plug.
I'm off to my mechanic now, he seems unable to locate this plug even though his shop is certified VW/Audi/Skoda/Seat repairs. Very strange.
Yes, it's 35 Swedish Crowns here, basically 3 Euros.
The pump itself is some 700 Euros.
I hope my pump is leaking from the plug, not someplace else.