Getting into Your Mercedes-Benz
Retrieving the mechanical key
Mercedes-Benz now features two SmartKey styles. The original and most common style is tapered, like the one shown to the right. To retrieve the mechanical key, slide the release catch found near the top of the fob in the direction of the arrow and pull the mechanical key away from the SmartKey (remote control or ‘clicker’).
There much more below and video help here…
In 2017, a second, rounded SmartKey style was introduced in the E-Class sedan, and is shown to the right. It migrated to S-Class sedans in 2018 and is found in all 2018 E-Class models.
Look for a button on the back of the newer key fob. Push the button and pull on the key ring end to remove the mechanical key, as shown in the image to the right.
If the keyhole is visible, use the mechanical key to unlock the driver’s door. This will set off the car’s alarm. Successfully completing the start process below will turn it off.
Beginning in 2015 with the S- and C-Class 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.
Make 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.
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.