h i, pls help if you can .. I have 1999 c280 elegance for 2 years and it has only required a new battery and oilfilter , i dont do many miles but the rear wipe washer has stopped working , it buzzes but nothing comes out .. my eyes are not great but mabe its blocked ... not sure where the water comes out or how to unblock it if thats the problem..............

 

solved it myself .....went to a jetwash and jetwashed around/at the rear wiper hub .... works fine now