I don't know any official free long term parking. I can help you out tho for free: I live 10 min away from the airport and have an underground parking. I don't use it tho, cos I park my car outside. If you want it for a week, it's yours. 

Nir, Thank you.  That would be fantastic. I'll need it starting 4am Monday 24th Nov  (or Sun evening ) and back on Mon 1st Dec in the afternoon. Would that be ok?

I'll write you a private message. 

How nice is that!  What goes around comes around :)

Careful Nir - you will now be inundated with requests...that reminds me - any chance of 2 weeks at xmas ?? (just kidding...)

wish i could Jeffery: that period I'm meeting the Dalai Lama to discuss strategies of helping the oppressed. 

You mean the Zurich members !!

The long-term parkings are only 101CHF per week.

(I wonder why people think that parking should be free. If you look at the sqare meter price anywhere in GVA, it certainly has a serious cost, which has to be covered by whoever is occupying those square meters. Or should it be subsidised by teh authorities, i.e. everyone else?)

I asked a policeman in the streat who told me there is no other way that get a monthly pass for a private or public parking or a macaron. The price being min 200CHF at Foundation des Parking.

Let me know where is that parking where you pay 100CHF per week. Can be usefull for the future. 

However, at present I do not have an expat status / budget. I don't even own a car myself and for my visitors Swiss prices are just out of mind :-@ ) And please don't tell me that if I'm not reach enough I shouldn't invite friends, or should live elswhere. I'd rather believe in people kindness (thank you Nir) and exchange economy.