Can not use the remote fuel release - is there an internal release?

Use your key to unlock the door / trunk. If your car starts up; it might just be a connector and / or your battery in your remote. Try the simple / cheaper fix check by checking the connectors leading to the trunk release solenoid.

Fuel tank doors can be operated electrically or by cable, you say 'release lever' so that points to a cable system, if they do not open, access to the flap can be gained by removing internal trim/carpet and manually operate the lock, check if the cable is connected to the back of the lever. Good luck

According to WIS, the remote boot release is directly connected to the PSE via CAN
The pneumatic system equipment makes vacuum or pressure available for the following systems:Central locking (CL), (pressure, vacuum)Remote trunk release (RTR), (pressure)- actuation via remote trunk release switch or via radio
AD80.20-P-2002-02B Remote trunk release, general notes on Models 202.01/02/12/12 as of 1.6.97,diagnosis, advanced information, RTR 208, 210 as of 1.3.97, 210.081Actuation of PSE control module:The remote trunk release switch (N72s15) is connected to the PSE control module (combined) (A37) via CAN data buses. The remote trunk release radio signal from the key is conveyed to the overhead control panel control module (N70) via theantenna. This transmits the signal to the electronic ignition switch control module (N73) via CAN data buses. If a valid signal is recognized there the PSE control module (combined) (A37) is actuated via CAN data buses. The remote trunk release IR signal from the key is conveyed to the respective door control module (N69/1, N69/2) via the IR receivers (A26/1, A26/2). This transmits the signal to the electronic ignition switch control module (N73) via CAN data buses. If a valid signal is recognized there the PSE control module (combined) (A37) is actuated via CAN data buses.
If the trunk lid is unlocked the LED in the remote trunk releaseswitch (N72s15) is actuated by the PSE control module (combined)(A37) via CAN data buses.
Special features on model 208.4 (Cabriolet)The trunk lid cannot be released remotely with the transmitter key.The rollover bar (RB)/soft top operation control module (N52)signals via the CAN interior data bus whether the soft top is lockedor unlocked or the power soft top switch (S84) is operated. As long as the CAN message reads:"Power soft top switch (S84) operated" or"soft top unlocked"the trunk lid cannot be released remotely.

Pneumatics testingPermissible leakage in complete system at:vacuum of 300 mbar within 1 minute: 30 mbarPermissible leakage of actuators with lines at:vacuum of 300 mbar within 1 minute: 25 mbar
Thanks

Yes you do, The first clips you removed are the secondary clips. The lines have to be released from the inside. Heres the info.. Cobra :-)
Removal

1. Open safety clip.
   
   
   
   

1. Fit Tool T90T-9550-B (5/16 inch) or T90T-9550-C (3/8 inch) to coupling so that tool can enter female fitting.
   
   
   
   

1. Push the tool into female fitting to release the retaining fingers from the formed male tube end.

1. Pull male and female fittings apart.
   
   
   
   

1. Remove the tool from the disconnected fitting.

1. Inspect the fitting for any internal parts that may have been damaged. Fuel tube should be replaced if internal parts are damaged.

see if there is power at the solenoid with the button pushed inside the car. if so change the lock solenoid. best of luck

IT SOUNDS LIKE IT IS TIME TO REPLACE HOLDER BEHIND FUEL DOOR EVEN IF YOU BREAK IT OFF TO OPEN ITS ONLY A FEW BUCKS TO REPLACE

an automotive shop should have the tools u need its a little plastic thing that goes over the fuel line and releases the clip inside the filter

You need a special tool to release the internal spring clips, if you have it, here is a tip, push the tool into the line, turn it while pulling on it, it should release. If you end up ruining the spring clip you can buy that from the dealer real cheap.

There is no release button. You have to unlock you car ( unlock using the remote ) and then push the fuel tank lid to open.