Belt tensioner 6( Phone number appears when clicking the contact button ) Pulley bearing 6( Phone number appears when clicking the contact button ) Belt size 6PK2000 The parts are for Mercedes Diesel OM651 4-cylinder (2.1) engines and fit the following: . Mercedes E250 BlueTEC models 2014-2016 . Mercedes GLK250 BlueTEC models 2013-2015 . Mercedes ML250 BlueTEC model 2015 . Mercedes GLE300 model 2016