I have a 1998 and had the same problem, the solution was really simple: just use your key to unlock all the doors and the fuel cap should unlock. It worked for me.
where is the power steering cap located on a citroen dispatch
Scenic fuel cap locks operate with the door system - it's a security thing - if you use the remote to unlock your doors then you will find the fuel flap will open. Of course it will lock when you use the remote to lock the doors.
The lock for the access door for the gas cap is part of the lock system for the doors. If the car doors are locked the fuel door is locked also. Unlock the doors and the fuel door is unlocked also.
unlock car using key, then just push fuel cap cover with your finger
The ignition and door key should fit the lock if it's the original filler cap, if it's not then a trip to the garage and hope they can help you.
make sure u unlock all the doors then the cap should unlock :-)
open the trunk.Right where the gas cap is pull the carpet back to exspose the gas cap area you should see a buttom to manually open the gas cap
You have to unlock the car doors for the filler cap door to unlock. This means ALL of the doors, not just the drivers.
On the expansionbottle to the left of the radiator, its black.
The lock for the access door for the gas cap is part of the lock system for the doors. If the car doors are locked the fuel door is locked also. Unlock the doors and the fuel door is unlocked also.
On a 2008 Ford Explorer you can have a fuel cap or the EASY FUEL system that doesn't have a fuel cap