Replace OE Nº. 366.208.0810 e o R-489P, better to engine cooling.
Water pump pulley of engine OM 352 turbo and OM 366.
Pulley of 3 grooves V ( simple belt ), with 2 grooves Ø external 163,5 mm and 1 groove Ø external 148 mm, with central hole Ø 28 mm and with 6 holes of fixation.