If your phone can do all the following, then yes, but our IPhone 5s and 6 can not. I was skeptical of MBrace at first, but like the features now. Was just something new to me and this old dog learned a new trick

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Safety and Security
From Roadside Assistance to antitheft measures to emergency aid, mbrace looks after you, your passengers and your Mercedes-Benz.
• Call for assistance after an accident or in any emergency situation. If an air bag is activated, your Mercedes-Benz can place an SOS call automatically, even if you can’t
• Directly connect with Mercedes-Benz Roadside Assistance for help with a dead battery, flat tire or other car trouble
• Get notified if your car’s alarm is set off, and let your car’s built-in GPS help authorities with stolen vehicle recovery
• If you ever find yourself unable to drive, let an mbrace specialist help arrange alternate transportation home
Remote Connections to Your Vehicle Interact with your vehicle’s features, and
send addresses to its navigation system, from your iPhone, Android or computer
• Send destinations and even exact routes to your
car’s available COMAND® navigation system from
your computer or smartphone
• Locate your vehicle from the Mobile App on your
phone when you can’t remember where you parked
• Remote-lock and unlock your car’s doors
• Sound your car’s horn and flash its lights to help you
spot it in a crowded parking lot, or to call attention
to a hazardous situation