Brent74 posted a topic in Operation and Maintenance: 450 Model, 2005-2006, dieselBought a Smart ForTwo Petrol auto (64 plate) two weeks ago; it’s just broken. Gearbox failure. Recovered to the garage where I bought it and they’re saying that the battery compartment is full of water and that I need a new ECU, which I take to mean - clutch actuator? I had informed them the week before that the hill assist wasn’t working at all, which I assume is also controlled by the actuator. No clue where the water has come from though? Any thoughts?