I don't have a red key with mine, never needed it and i've had the battery out for days on end. It's no big issue, in fact it's a bonus as you tell the seller it's quite serious and demand a fair whack off the asking price
I agree with Matt. I have spoken to a Coupe specialist who has worked on hundreds of Coupes, and said he has never needed the red key. So I wouldn't worry about it. However, use it as a bargaining tool... :devil:
H