Problems with Car Wiper and Strange air con smell

[dmxtech]

i had 2 problems with my Merc that is less than 9 months old. The wiper arm and blade judder and give out quite loud noise when wiping the windscreen during raining. Actually this problem started when i collected my car. Am quite confused, cos my car is still new. I tried to spray rain repellent solution on my windscreen, it help a bit.. but after swiping for 5-10 mins, the juddering n vibration of my wiper starts again...So i replaced it with a brand new Wiper, but the problem persist just with lesser noise..

Sent to my parallel importer authorized repair shop.. they said nothing can be done and just brush it off by saying my windscreen is dirty, but i already clean it so thoroughly..

 

2nd problem, recently i noticed after my 1st car servcing done, i had notice a strange smell coming out from my air con vent, it smell like petrol. The smell is most obvious when i pump petrol or when i start my car engine. Then the smell vanish after driving for a while. I cant really be 100% sure if it is really petrol smell.. but it smell like Vanilla Liquor Smell...

I sent my car to the technician, and he say there is no leakage and nothing is wrong..

 

Any experience bros around that have similiar experience or expert in this. Very much appreciated..

[blackmercs]

99% got these issues which commonly found in c class.. Do a sesrch as these issues has been discussed million of times.

[darksaint]

One bro here suggest using the autosol windscreen cleaner which can be found in most petrol station around $10 a bottle

Merc charcoal aircon filter tend to have this smell after some time during car startup

Try replace the aircon filter and smell should go away.