"It is just testing and so you can't say much. But it was good that we were able to do so many miles, Nico (Rosberg) even did a race simulation, which is something the others were not able to do.
"Only in Australia will we see something representative," added Wolff. "The cars are going to change a lot until then, (as) there is a lot more testing to do."
German Rosberg agrees that, while Mercedes had a successful test in southern Spain with good reliability, "a lot of work" still lies ahead before Melbourne.
"Performance-wise we don't know where we are because you can't really compare to the other cars, but that's not the focus right now," he insisted.
Teammate Lewis Hamilton added: "It's a bit early to say this definitely, but right now the car feels pretty good.
"So far so good; now we just have to continue working hard and see what happens in Bahrain."