Step #1 Cook the potatoes in boiling water; slice & keep warm.
Step #2 While the potatoes are cooking, salt & pepper to taste, prepare the marinade: mix vinegar, sugar, oil, & onion in a small bowl; stir until sugar dissolves (or you give up).
Step #3 Pour marinade over warm potatoes; stir this to mix; allow to "work" for at least several hrs (overnight is better) at about room temp.
Step #4 Just before serving, add mayonnaise, pickles & eggs.
Step #5 NOTE: My quilting friend pointed out that the pickles & eggs were strictly optional, & even the mayo wasn't "required.
Step #6 ".
Enjoy the The Other Kind of German Potato Salad recipe