Tanks in WW1 were not wonder weapons that were war winning. They may help create a break in, but that was never the problem. The problem was exploiting the breakthrough, an issue never solved on the West Front and could not be by the tank, as it was a short ranged weapon that broke down frequently. The great 100 days advance was achieved against a defeated, decimated, starving, under-equipped, overextended, morally-collapsed army that still managed to prevent a break through while inflicting over 1 million casualties on the enemy (with the largest collection of tanks ever seen at that point in history).
Also the issue of production is completely ignored here. Austria could not build these vehicles. Of all the great powers, they were probably the least industrialized (save Italy) and in 1916 produced fewer that 600 airplanes! Germany was forced to supplement the supply of Austria for just about everything including locomotives to transport their armies to the front and keep them supplied. Germany was starved of critical resources and had to prioritize their production for necessary war materials (artillery, machine guns, rolling stock-incredibly important and in short supply, basically all the non-sexy stuff that makes war possible). These materials were always in short supply, so producing tanks (which for Germany would not be useful until 1918) would be taking away from other more important projects that kept the army in the game until the end OTL.
Basically tanks are a no go for the Central Powers in WW1. There relevance would not come until their use in exploitation was realized by WW2 where they would become indespensible. Prior they just had potential to be rather than being a war-winning weapon.