7mm is nowhere near the low mark, it's not even halfway between 2&3, I still work in imperial 😀 and it came to me direct from the factory 1/4" below the top mark so maybe 6mm is closer
Filling to the top mark is clearly wrong! If you look in the cars handbook page 127 it shows a diagram of the dipstick numbered 1,2 & 3 (1) is marked as low, (3) which is the top spot on the dipstick is marked as excessive.
From that you can presume that the correct level is somewhere between 2 & 3, certainly not on the excessive mark and definitely not 5mm above it as was done to my car and many others from what i have read here, so how can a precise amount result in that? clearly something is wrong at the dealers and the engine is not warmed up so they drain cold oil and don't wait for it to finish trickling out
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