See also:

Exhaust check
WARNING Inhalation of exhaust gas is hazardous to your health. All exhaust gas contains carbon monoxide (CO), and inhaling it can cause unconsciousness and possible death. Do not run the eng ...

Low outside temperatures
DEF freezes at a temperature of approximately 12 °F (–11 °C). The vehicle is equipped with a DEF preheating system when it leaves the factory. Winter operation is therefore also guaranteed at ...

Safety & Features
As of this writing, neither the National Highway Traffic Safety Administration nor the Insurance Institute for Highway Safety has tested the E-Class wagon. (IIHS has tested the E-Class sedan, but ...