e320cdi estate 02 plate taxi and 210.000 miles when pulling belt out made sqweeky groaning noise. members said lubricate roller. merc man advised couldnt be roller cos only made noise on part of belt being drawn over top roller that is if there is a roller there at all. merc man advised useing mr sheen furniture polish on inside of belt only in area that runs over possible roller .sprayed on and rubbed in with finger .... perfect ........great ....bliss...:bannana: