I’m in London and no I don’t have any diagnostics tool apart from a basic eBay one can you please help me I will pay for you time thank youWell rule number one is do not sit stopped with a Smart car in gear. Would you sit in gear with the clutch down that long at traffic lights in a normal manual car?
Because it is an automated manual gearbox you should never sit in gear for a long time.
Where are you?
Do you have access to a Star system? You need to read the fault codes with something capable.