Originally Posted by TVT_DESIGN
Just as a heads up, MB has changed all motors to 5w40 M-formula. 0w40 was deemed too thin at startup.
Did they change all for past motors as well or is it a change that they made for motors being built today moving forward? I was not going to live with that tapping which was obnoxious for the first 5 seconds or so and was still there all the time although much less during idle. The only change was the oil and it instantly went away.