Hi Didier, Unfortunately you can't do the repair yourself. It must be processed on industrial machinery under environmental control, etc. You must send me the complete climate control module-- it is easy to remove, takes about 10 minutes and needs only a screwdriver to take out. Note that it is difficult but not impossible to drive the car without the module (the gas tank door switch is gone so you have to use the string in the trunk, no fog lights, etc). The price for the rework is US$550 plus shipping to France. You can send me your unit and an international money order for US$550 and I will repair your unit and ship it to you-- I can usually repair and ship back within 2 or 3 days. Alternative, if your car is left hand drive, you can send me US $850plus shipping to France and I will send you a reworked, upgraded module. You then put the new module in, ship me the old module, and I will refund you $300 US. This way your car is always complete. Please let me know what you would like, best regards Bob Gauthier 10294 Rue Cannes San Diego CA 92131 USA gauth@adnc.com