Possible Clues:

• Box where sculpture perhaps hidden in deception
• Packet of great weight at back of vehicle
• Small light box
• For boxing the motor won't (or can't) weigh so much
• A container for Dickensian hero
• Your bus is not back to get this container into it
• Perhaps for boxing with the weight of a vehicle
• The weight of the vehicle, just in case of this
• Box of significant weight next to vehicle
• Box with 'far, far better' character