Since your hatch isn't opening, the problem lies with the mechanism, wiring, or possibly the fuse. There's no way to manually override it from inside the vehicle. You'll need to troubleshoot the problem:
* Check the fuse: Consult your owner's manual to locate the fuse for the rear hatch release. Replace it if it's blown.
* Check the wiring: This is more complex and may require some mechanical skill. The wiring harness leading to the hatch release might be damaged or disconnected. You'd need to inspect it carefully, possibly tracing the wires from the release switch to the motor in the hatch.
* Check the latch mechanism: The latch itself might be jammed or broken. This will require accessing the latch mechanism from the outside, which could be difficult if the hatch won't open.
* Try the key fob: Ensure the key fob battery is good and that the key fob itself is properly programmed.
If you're not comfortable with auto repair, you'll need professional assistance. A mechanic can diagnose the problem and repair the hatch release mechanism or latch. Attempting to force the hatch open could cause further damage.
