* Check for a key or remote: The most obvious solution.
* Spare key: If you have a spare key, use it.
* Unlocking mechanism inside the car: Some models have an internal release lever inside the car, often near the armrest or in the glove compartment.
* Professional locksmith: A locksmith can open the trunk without damage.
* Emergency roadside assistance: If you have roadside assistance, they can help.
Attempting to remove the back seat to access the trunk will likely damage the interior and is unnecessary.