The diesel engine Citroen C3 have the fuel filter located in the engine bay, under the air intake pipe to the air filter.
There are some pictures on this forum post:
http://citroenc3owners.com/diesel-c3-tips/how-to-change-the-air-filter-on-a-citroen-c3-1-4-16v-hdi-t80.html
and some instructions to remove the diesel filter here:
http://citroenc3owners.com/diesel-citroen-c3/changing-the-diesel-fuel-filter-t102.html
The petrol engine Citroen C3 has a filter in the fuel tank that lasts the life of the car.
Its under the turbo air inlet pipe in the engine bay. there are some photos of the Citroen C3 HDi fuel filter in the forum link http://citroenc3owners.com/diesel-c3-tips/how-to-change-the-air-filter-on-a-citroen-c3-1-4-16v-hdi-t80.html http://citroenc3owners.com/resources/citroen-c3-hdi-air-inlet-pipe-lower-mounting-point-inlet-pi/54
citroen c5 2006 fuel filter location
Its in an air box, at the back of the engine. (Between the engine and the firewall) There are some pictures here http://citroenc3owners.com/diesel-c3-tips/how-to-change-the-air-filter-on-a-citroen-c3-1-4-16v-hdi-t80.html The 8 valve version needs the 3 screws to be removed from the lid to access the air filter. The instructions for the 16v are more complicated and are here http://citroenc3owners.com/diesel-c3-tips/how-to-change-the-air-filter-on-a-citroen-c3-1-4-16v-hdi-t80.html
The Citroen C3 is considered a green car. It uses diesel fuel and gets 83.1 miles per gallon for models with the automatic transmission. The manual transmission models get between 64.2 and 78.5 mpg.
The fuel filter on a Citroen Xsara is under the car next to fuel tank, just in front of the rear drivers side wheel.
On the front of the engine inside a plastic cover with a 27mm "nut"
i have a citreon c2 vtr can you tell me the location of the fuel filter?
Filter is located on the exterior of the fuel tank
OAT Coolant.Mix the concentration dependant on your country (lowest temperature).seehttp://citroenc3owners.com/citroen-c3-tips/citroen-c3-coolant-t40.html
There are many features of the Citroen C3 Picasso. Examples of some features of the Citroen C3 Picasso includes an anti-lock breaking system and remote central locking.
Red OAT antifreeze and coolant. Premixed will be easiest. See the link for more information: http://citroenc3owners.com/citroen-c3-tips/citroen-c3-coolant-t40.html
Between the fuel tank and the engine !