I opened the trunk on my 300D to see how much grease was in my veggie tank. Closed it and it didnt sound like normal in some way? It was raining so I just went inside. Tried to open the trunk today to fill tank and it wouldnt open? button goes in but doesnt act like it pushes anything? the key slot is paralell with trunk lid not up and down. I have never locked the trunk and dont know if the one key I got with the car is supposed to unlock trunk but it wont turn the lock. Dont want to break the lock or the trunk but dont know how to get it open? Any clues?