See also:

More power, lower consumption: the engines
An improvement of up to 31 per cent has been achieved in fuel consumption and all Mercedes-Benz C-Class launch models will feature the ECO start/stop function as standard. All the engine variants ...

Setting the front-compartment temperature using the front control panel
Turn the SmartKey to position 2 in the ignition lock. To increase/reduce: press the rocker switch up or down. Only change the temperature setting in small increments. Start at 72 °F (22 °C ...

Additives
Only use DEF in accordance with ISO 22241. Do not use additives with DEF and do not dilute DEF with water. This may destroy the BlueTEC exhaust gas aftertreatment system. ...