Smart Key functions

See also:

Even more agile: sports suspension and Dynamic Handling package as an option
In addition to the standard-specification AGILITY CONTROL suspension, the C‑Class offers two other options for adjusting the suspension's characteristics in line with drivers' personal prefe ...

Driving, Part Two
The CL's standard Airmatic suspension is hard to fault. It can operate in either its default Comfort setting or a firmer Sport setting. Without going into technical details, I'll say that it absor ...

Automatic engine start
The engine is started automatically if you:  - release the brake pedal when HOLD is not activated and the transmission is in position D or N  - shift the transmission to position R ...