If you have unintentionally locked your vehicle (e.g. the SmartKey is still in the vehicle) and a replacement SmartKey is not available, the vehicle can be opened by a Mercedes-Benz Customer Assistance Center.

The vehicle can be opened remotely up to four days after the ignition was last switched off.

Contact the following service hotlines:
• USA: Mercedes-Benz Customer Assistance Center under 1-800-FORMERCedes(1-800-367-6372) or 1-888-990-9007
• Canada: Customer Service at 1-888-923-8367
You will be asked for your password.
Return to your vehicle at the time agreed upon with the Mercedes-Benz Customer Assistance Center.
Pull the trunk lid handle for at least 20 seconds until the indicator lamp in the SOS button flashes.
The Connecting Call message appears on the multifunction display.

Alternatively, the vehicle can also be opened via the Internet or an iPhone in the "Owners Online" section using your ID number and password.

Vehicle remote unlocking is only possible if the corresponding mobile phone network is accessible.
The SOS button flashes and the Connecting Call message appears in the multifunction display to confirm that the command for vehicle remote unlocking has been received.
If you pull the trunk handle for more than 20 seconds before receiving authorization for remote unlocking, you must wait 15 minutes before you can pull the trunk lid handle again.