BENZTECH MODULES

Experts in Mercedes Benz Module Programming

Mercedes Benz Electronic Key Fob Programming Frequently Asked Questions.

Below is a list of frequently asked questions regarding the programming and repair of the Mercedes Benz Electronic Key Fob and your options for New Keys / Key Fobs for Mercedes Benz C-Class, E-Class, R-Class, CL-Class, S-Class, GLK, SLK, and chassis W203, W204, W207, W164, X164, W210, W211, W219, W220, W221, W208, W463, R171, R230.

Frequently Asked Questions about

Mercedes Benz Electronic Key Fob Programming

What is an electronic key fob, and why might I need to program it for my Mercedes-Benz?

An electronic key fob is a remote control device that allows you to lock, unlock, and sometimes start your vehicle. Programming is necessary when adding a new key fob, or replacing a lost one.

I lost all my keys. How can I get a new key?

If your vehicle is equipped with FBS3 encryption technology. (Most Mercedes-Benz models between 1996-2014) a key can be programmed by a third party such as a locksmith or module programmers like us at BenzTech Modules. We require the Electronic Ignition Switch (EIS) in order to program a key. It must be removed from the vehicle and shipped to us.

I have a 2015 or newer Mercedes, can you program a key for me?

No. 2015+ models have FBS4 encryption. Only the Mercedes-Benz Dealers are able to program a key. The aftermarket technology has not reached the point of programming FBS4 Electronic Ignition Switches or keys.

How do I know if my Mercedes-Benz key fob needs programming?

If your key fob is not working, experiencing intermittent issues, or if you've recently replaced the fob, it may require programming. Consult your vehicle manual or reach out to our experts for guidance.

Is key fob programming a standard service during routine maintenance for Mercedes-Benz vehicles?

Key fob programming is not typically part of routine maintenance. It is usually performed when adding a new key fob, replacing a lost or damaged fob, or addressing issues with the existing fob.

Can “Keyless Go” be programmed into my key?

No. If your vehicle did not come equipped with Keyless Go, it is not as simple as programming a key or an EIS. Keyless Go uses various modules throughout the vehicle for functionality.

How do you change the battery in a Mercedes Benz key fob?

If the key fob has bad signal strength and needs multiple clicks to work, then it most likely has a dead battery. If the key fob red led indicator light located at the top of the key doesn't illuminate while pressing the buttons, and it does not unlock/lock doors. It's most likely the key battery that needs replacing. The key fob should still start the car, as the EIS powers the key fob through an energizing coil. Use your emergency key blade to unlock the door and insert your key fob to the EIS to start the vehicle. If the key fob does not start your car, there is likely an issue with the ignition switch. Assuming the main car battery, the EIS, and ESL fuses are good. Even if your key fob isn't working as expected, you should still be able to start your car by using the emergency blade that usually comes with the fob. We made this walk through video to show you how to do it.