It did not give viscosity just Mercedes specs which cover of variety of viscosities. Part of my issue also is I am OCD. I had first changed oil with 5W-30 and it seemed noisy to me. Then I changed it with 0W 20 because in the manual there was an Asterix next to that spec, which happened to be 0W 20 and I figured that was probably the factory fill. It said to use for best mileage which I assumed is probably what they put as a factory fill. I called four different dealerships and got three different viscosities that they told me was the factory fill. However, two of them said it was 0w/20. I also went on Mobil 1’s site and put in my car info and it said 0W 20 which is what is in the car now. I am not as concerned as much about mileage as I am about protecting the engine so I am considering 0W 30 but again I have OCD and just want to use whatever is the best for the engine. Seems like a little high reving four-cylinder turbo should have something more than 0W-20. The car is my wife’s and only has 2,700 miles
