Mine sits straight up (w126 300SD) and it looks pretty decent there.
Traffic pile-ons and passing trucks doing 90 on the freeway in rain + 30MPH wind caused it to bend back the other way sadly

I have drivin my car beyond 100MPH and it should stand straight up (or slanted if that is where you started) the whole time if there is no headwind (good spring).

Do I drive fast?