To find it, you should:
* Check the rear seat armrest: This is the most common location. Many models have a small lever or button hidden within the armrest's fold-down mechanism.
* Look on the trunk side: If you can partially access the trunk from the cabin (e.g., a pass-through), there might be a lever there.
* Consult your owner's manual: This is the definitive guide to finding the internal trunk release for your specific Volkswagen.
If you can't find it after checking these locations and consulting your owner's manual, you may need to call a locksmith or roadside assistance.