When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Check the valet lock switch inside the glove compartment. That feature allows you to lock the trunk by locking the glove compartment with the mechanical key and leaving the electronic key for the valet.
I checked that first when my wife complained the trunk wasn't working. I figured she had turned it off or something. It just stopped working for no reason.