They are not yet sold in America.
Fiat should soon start the export.
Should be in 2010.
http://wot.motortrend.com/6305517/auto-news/fiat-ceo-reveals-plan-to-bring-alfa-to-us-ahead-of-schedule-in-2010/index.html
It can be done two ways;
General cleaning removing tank cleaning all pipes,tubes,injectors replacing filter.
Would just replace the filter and see how it goes...
They are both built by Peugeot,Toyota,Citroen in the Czech republic.
The C1 was criticised for water leaks during rainy days,enough said.
http://en.wikipedia.org/wiki/Peugeot_107
http://en.wikipedia.org/wiki/Citro%C3%ABn_C1
Battery to be disconnected.
Mounting bolt and nut to be removed usually they are 17mms
Tensioner to be removed usually they are 12 or 11mms.
Wires from alternator to be removed usually 10,8 and 12mms connections.