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Mercedes-Benz Dead Key Fob Help

Getting into Your Mercedes

Retrieving the mechanical key

In a Mercedes-Benz, push the release catch in the direction of the arrow and Mercedes Keyremove the mechanical key from the SmartKey (remote control or ‘clicker’). If the keyhole is visible, use the mechanical key to unlock the driver’s door. This will set off the car’s alarm, which will be taken car of when you successfully complete the start process below.

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Beginning in 2015 with the S- and C-Series vehicles and extended in 2016 to the GLE, the keyhole is hidden beneath a cap at the end of the driver’s door handle (below right). The mechanical key will be used a lever to remove the cap to expose the key hole.

Mercedes lock coverMake sure the handle of the mechanical key is pointed away from the paint. Insert the key into the opening (black arrow) underneath the cap as far as it will go. Hold the door handle out. Pull the cap that is now on the mechanical key as straight as possible away from the vehicle until it releases.

Once removed, the key hole is visible and available to insert the key and unlock. As above, this will set off the car’s alarm, which will be taken care of when you successfully complete the start process below.

Click here for video help specific to Mercedes models and key fobs.

Important
After using the mechanical key, return it to the electronic key fob. The key fob itself may require the mechanical key to be present to operate.

Starting Your Mercedes

Mercedes Start ButtonTo start your Mercedes, the engine Start / Stop ignition button must be removed. It appears to ‘float’ above the dashboard and is easily pulled away from the ignition lock. Insert the tapered end of the KEYLESS-GO key in the ignition lock and turn it to start and operate old school style.

Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text Engine Start Operation Indicatormessage to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Check out this page for more!

Click here for video help specific to Mercedes models and key fobs.

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* Keep these instructions with you in our Dead Key FOB App. Search “Dead Key FOB” at your device’s store or click here.

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