Mercedes® Serpentine Drive Belt, 6K 2370 mm, 2001-2006

If it's been over 3 or 4 years since their last inspection, the V-belts or mono belt need to be checked and/or replaced. Inspect for cracks and separation of the belt plies. Also check for fraying and glazing, which makes the look glossy or shiny. Be sure to look at both sides of the belts and also see that the belts are tensioned properly.