Hello. Im new here. I own a 1999 Audi A6 Avant. I would appreciate any info. Please see picture. I have a slow leak of coolant. I noticed that there is a tube possibly missing going to my reservoir. In the picture, it is the drain piece that is the far right. When reservoir is placed in car, its at the bottom left back of reservoir (closer to firewall and windsheild not closer to front bumper) the other 2 drain pieces have regular hoses running to them, but the piece in question is absent of a hose. thanks.

 

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That is just the pressure release drain tube and don't recall there being a drain hose on it. If you are getting coolant dripping from it, most likely you could use a new cap. That's providing the tank isn't overfull. Should be between "MIN" and "MAX" when COLD.

 

my air condition unit does not work at all, when i put a fuse in it automatically starts smoking and blows the fuse. the heater unit shows no action what so ever. Need help! thanks