I have 19" rims on a 2019 MB GLE 350. It just didn't work and I had to drive to my local MB dealer, to get an OEM. The difference is simple: the diameter of the original key is much smaller, and the outer case is covered in plastic to allow it to rotate freely (TEMO has metal on metal). First I nearly damaged the rim trying to insert the key and then trying to remove it. Don't waste your time, I definitely wasted mine.