Serpentine/Fan Belt (6PK691) NCV3, om642, V6

This belt is the short belt that runs the fan on all V6 om642 motors with no rear AC. 
It could also be referred to as the "fan belt".
It is extremely short and also confusing to figure out how to replace it. 
The old one must be cut off and the new belt is slowly rolled on to the pulleys as the engine is turned over by hand. There are a few videos on YouTube that explain the process.
Also Known As: 6PK691
 
This belt is manufactured by Continental under the line Contitech. This is the highest quality belt you can get for your Sprinter van, period. 
 
Compatible with
2021 Mercedes-Benz SprinterBase3.0L V6 - Diesel2020 Mercedes-Benz SprinterBase3.0L V6 - Diesel2019 Mercedes-Benz SprinterBase3.0L V6 - Diesel2018 Mercedes-Benz SprinterBase3.0L V6 - Diesel2017 Mercedes-Benz SprinterBase3.0L V6 - Diesel2016 Mercedes-Benz SprinterBase3.0L V6 - Diesel2015 Mercedes-Benz SprinterBase3.0L V6 - Diesel2014 Mercedes-Benz SprinterBase3.0L V6 - Diesel2013 Mercedes-Benz SprinterBase3.0L V6 - Diesel2012 Mercedes-Benz SprinterBase3.0L V6 - Diesel2011 Mercedes-Benz SprinterBase3.0L V6 - Diesel2010 Mercedes-Benz SprinterBase3.0L V6 - Diesel