UK Car Repair: serpentine belt, 2003 mercedes ml350, serpentine belt

Question
2003 mercedes ml350. Serpentine belt came off and can't find a diagram to put replacement on. Any advise please?

Thank you!


Answer
I don't know what model this is, it is not sold in the USA. many cars have a picture of the routing on the underside of the bonnet. If not, draw a picture of the pulleys, some will be grooved and some will be flat.  Clearly, the grooved side of the belt has to fit on the grooved pulley and the back of the belt (flat) mates with the plain pulleys. You should then be able to figure out the routing. You will need to de-tension the adjuster using the proper socket in the centre and a long bar, it turns anti clock.