My 2013 Smart fortwo (Brabus, Conv) just would not go - move - turn over ... until I waited 10 minutes or so. At first; turned off and it froze in gear. NOTHING I did 'fixed it". But shortly after waiting at the stop sign, magic - it started and i drove home. Local repair shop says it may be in a program thats new. therefore Im going to MB next week. Any ideas why this may happen?