Hello, I am replacing the accessory belt rollers on my Mercedes OM642 engine because they are worn out. What is the standard torque for the idler pulley nuts, and what is the torque for the torx screws on the belt tensioner assembly, and do I need to tighten them at an angle? Can anyone with experience help me? Thanks.

If you will provide VIN number of your car I could send you specs and instructions.