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Component Description: (A) Equipment., (B) Seats:front assembly:seat heater/cooler.

Service Bulletin Summary: Check airscarf for proper operation, re-connect if necessary ( nhtsa item number - 10094742 ).

Affected Component: Air bags:frontal:sensor/control module-inactive | electrical system:software.

Summary: Mercedes-benz usa, llc (mbusa) is recalling certain 2016 amg gt-s, glc300, cla250 and gle300d 4matic vehicles, 2013 c250, e350 bluetec and g63 amg vehicles, 2008-2014 c300 vehicles, 2013-2014 c300 4matic and ml350 4matic vehicles, 2009 c350 vehicles, 2014 cls550, e350 4matic, e350 coupe 4matic, e350 wagon 4matic, glk350 and sl550 vehicles, 2012 cls550 4matic vehicles, 2012-2016 e350 vehicles, 2016-2017 gl450 4matic vehicles, 2012-2014 ml350 4matic bluetec vehicles, 2015 s550, s550 4matic and c300 4matic sedan vehicles, 2015-2016 c300 sedan vehicles, and 2017 sl63 amg vehicles. Various control units on these vehicles may have been updated with incorrect software, potentially affecting the correct deployment of the air bags in the event of a crash. .

Conequence: If the air bags do not deploy as intended in the event of a crash, there would be an increased risk of injury in the event of a crash. .

Remedy: Mbusa will notify owners, and dealers will update software in the affected control units, free of charge. The recall began april 21, 2017. Owners may contact mbusa customer service at 1-800-367-6372. .

Notes: Owners may also contact the national highway traffic safety administration vehicle safety hotline at 1-888-327-4236 (tty 1-800-424-9153).

Affected Component: Seat belts:pretensioner.

Summary: Mercedes-benz usa, llc (mbusa) is recalling certain 2017 c300, c300 4matic, c300 coupe, c300 coupe 4matic, c43 amg, c43 amg coupe, c43 amg cabrio, c63 amg, c63 amg coupe, c63s amg, c63s amg coupe, c63s cabrio, glc300, glc300 4matic, glc43 amg, s550, s550 4matic, s550e, s600, s63 amg 4matic, s65, mercedes-maybach s550 4matic, and mercedes-maybach s600 vehicles. The affected vehicles have front seat seatbelt pretensioners that may not function properly in the event of a crash. As such, these vehicles fail to comply with the requirements of federal motor vehicle safety standard (fmvss) number 208, "occupant crash protection," and 209, "seat belt assemblies. ".

Conequence: If the front seat seatbelt pretensioners do not function properly, the seat occupants may not be adequately restrained in the event of a crash, increasing the risk of injury. .

Remedy: Mbusa will notify owners, and dealers will replace the front seat belts, free of charge. The recall began october 13, 2017. Owners may contact mbusa customer service at 1-800-367-6372. .

Notes: Owners may also contact the national highway traffic safety administration vehicle safety hotline at 1-888-327-4236 (tty 1-800-424-9153).

Affected Component: Steering:electric power assist system.

Summary: Mercedes-benz usa, llc (mbusa) is recalling certain 2017 e300, s65 amg coupe, s550, s65 amg cabriolet, s550 cabriolet, s550e, s65 amg, and mercedes-maybach s600 vehicles. A transistor within the power steering control unit may overheat resulting in the power steering system being disabled. .

Conequence: If the power steering assist is unexpectedly disabled, it may increase the risk of a crash. .

Remedy: Mbusa will notify owners, and dealers will inspect the steering rack, replace it as necessary, free of charge. The recall is expected to begin in january 2018. Owners may contact mbusa customer service at 1-877-496-3691. .

Notes: Owners may also contact the national highway traffic safety administration vehicle safety hotline at 1-888-327-4236 (tty 1-800-424-9153).