tyaughton wrote:
I've seen a few Smart Cars being towed; they are "semi automatic" - you have to shift to change gears,
....
Incorrect.A smart car is an "automated manual". It has a 5-speed manual transmission, but it does not have a clutch pedal. The computer does all of the shifting.
It can be driven in manual mode or in automatic mode - and one can switch between the modes on the fly, at any speed.
Automatic mode: You put the floor shifter in "D" and drive the car as if it has an automatic transmission.
Manual mode: With the floor shifter in "D" you pull the floor shifter to the left. There is a "+" and a "-" on the shift console. Push the floor shifter forward "+" to upshift and pull it back "-" to downshift. Pushing the floor shifter to the right "D" will put the car back into Automatic mode.
If the car is like mine and also has paddle shifters on the steering wheel you can ignore the floor shifter and switch between Automatic and Manual shifting using just the paddles. Left paddle is downshift, right paddle is upshift. Using either paddle will put the transmission in Manual mode. The indicator on the dashboard will change from "D" to 1/2/3/4/5 gear selection. Pressing and holding the right paddle until indicator on the dashboard changes to "D" (about 2.5 seconds) will put the car back in Automatic mode.
Note: even when in Manual mode you're not doing the shifting. You're telling the computer that you want to upshift/downshift - and the computer then does it for you.
My 2009 smart fortwo Passion has a curb weight of 1,806 lbs (US) and only requires a battery disconnect switch for flat towing.