hmmmm Ive got the same problem and just posted it - but after reading this Im wondering if my antena is the problem because it doesnt work either! Ive noticed a lot of us sl owners have these types of problems with the car not starting after sitting for a while. Mine is so wierd that as soon as the chargers cables are attached to the battery the dang car starts!! Im at my witts end with it! Good luck to you.