Smart Key

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Power, Eventually
Weighing more than 4,600 pounds, our all-wheel-drive test car was heavier than many large crossovers. But its engine — a 5.5-liter V-8 good for 382 horsepower and an impressive 391 pounds-feet of ...

Resetting triggered NECK-PRO head restraints
WARNING For safety reasons, have the NECK-PRO head restraints checked at an authorized Mercedes-Benz Center after a rear-end collision. WARNING When pushing back the NECK-PRO head r ...

System self-test
If an adult occupant is properly sitting on the passenger seat and the OCS classifies the occupant as an adult, the indicator lamp illuminates and goes out again after approximately 6 seconds ...