I have read that I should be able to tell if I have a keyless remote enabled car by finding a black computer type box in the left side of the trunk...I can not find such a box, only a fuel pump controller and a intertia switch. Is the location the same for convertibles as coupes? BTW I was told by the seller it had remote keyless entry but he lost the fob...I would like to confirm this before buying another fob...thanks!