The extension I take to specify brand. Why there are two different extensions for Stabilus I have no idea, but you'll see it from time to time. One thing I'll say about MB parts. I'm sure MB has a contract with Stabilus to produce this part. What we don't know is what that contract says. So when the MB star gets put on it, it may or may not be the same part anymore. When I replaced my motor mounts with Lemfoerder, I compared with the original, and they were identical in appearance, except the MB star had been ground off the Lemfoerder. So if it has the star, it meets the contract. if it doesn't, the maker is free to turn out whatever they think their reputation allows.