This belt fits my 2007 ML350 perfectly. 2) locking pin. I used a 2" nail for the locking pin, it worked, only took me a few minutes to swap it out. At that moment the engine started again, the sound of the mop disappeared. I will report on the quality of the belt in a few months, after 2 months and 4 days the belt broke, the machine was out of order. Luckily this happened in a supermarket car park and during the day. I had to go to a Mercedes dealer, buy an original belt and have it replaced. I would have big problems if this happened while driving on the freeway or at night. In the end, I realized that going cheaper isn't worth it. It's garbage