Sounds like a dead battery
I own a 2010 SMART for two Passion. I had an ABS light on, so I had a mechanic friend in Colorado scan it and told me it needed a ABS sensor... I replaced it back home in Arkansas. The ABS light would not go off..even after disconnecting the battery and crossing the leads... so I bought a FOXWELL ABS and Airbag rest tool off Amazon. I started the car and attempted to clear the ABS light using the OBDII port and this reset scanner tool..now my car won't even start..I just hear a relay click under the dash when I turn the key. I checked all fuses and tried unlocking/locking the doors with the key just in case it was the anti-theft system interfering. I have no idea what happened here..any suggestions are appreciated...