2017 Mercedes GLS 450 Key Fob Battery Replacement: A Comprehensive Guide

Replacing the key fob battery in your 2017 Mercedes GLS 450 is a simple task that can save you time and money. This guide will walk you through the process, offering expert advice and troubleshooting tips for common issues. We’ll cover everything from identifying the right battery to programming your key fob after replacement.

Understanding Your Mercedes GLS 450 Key Fob

The key fob is more than just a key; it’s a sophisticated piece of technology that allows you to lock, unlock, and start your vehicle remotely. Knowing its components and functions is crucial for proper maintenance. The 2017 model uses a CR2032 battery, a common type readily available online and in stores. Ignoring a low battery warning can lead to unexpected lockouts, so understanding how to replace the battery preemptively is essential.

How to Replace Your 2017 Mercedes GLS 450 Key Fob Battery

Replacing the battery is a straightforward process that requires minimal tools. You’ll need a small flathead screwdriver or a similar tool to pry open the key fob casing. Here’s a step-by-step guide:

Locate the release button: On the side of your key fob, you’ll find a small release button. Press it to release the emergency key.
Open the key fob casing: Use the emergency key or a flathead screwdriver to carefully pry open the key fob casing. Start at the notch where the emergency key was released. Be gentle to avoid damaging the plastic.
Remove the old battery: Once the casing is open, you’ll see the CR2032 battery. Carefully remove it using your fingernail or the flathead screwdriver.
Install the new battery: Place the new CR2032 battery into the compartment, ensuring the positive (+) side is facing upwards.
Close the key fob casing: Align the two halves of the casing and press them together until they snap shut.
Test the key fob: Try locking and unlocking your car to ensure the new battery is working correctly.

Troubleshooting Common Issues

While the process is generally straightforward, you might encounter some issues. Here are a few common problems and their solutions:

Key fob not working after battery replacement: Ensure the battery is installed correctly with the positive (+) side facing up. If the issue persists, try re-synchronizing the key fob with your vehicle. Consult your owner’s manual for instructions on how to do this.
Difficulty opening the key fob casing: If you’re having trouble prying open the casing, try using a thinner flathead screwdriver or a plastic opening tool. Avoid using excessive force, which can damage the key fob.
Key fob buttons unresponsive: If the buttons are unresponsive, try cleaning the contacts with a cotton swab and alcohol. If this doesn’t work, the key fob itself may be faulty and require professional attention.

“A common mistake people make is using the wrong type of battery. Always double-check that you’re using a CR2032 battery for the 2017 Mercedes GLS 450 key fob,” advises John Miller, a certified automotive locksmith with over 15 years of experience.

Maintaining Your Mercedes Key Fob

Regular maintenance can extend the lifespan of your key fob. Keep it clean and dry, and avoid exposing it to extreme temperatures. “Protecting your key fob from physical damage, like drops and impacts, is crucial for its longevity,” adds Maria Sanchez, a senior technician at KEYFOBPROG. “A protective case can be a worthwhile investment.”

Conclusion

Replacing the 2017 Mercedes GLS 450 key fob battery is a quick and easy process that anyone can do with the right guidance. By following these steps and troubleshooting tips, you can save yourself the cost of a professional replacement and keep your Mercedes running smoothly.

FAQ

What type of battery does the 2017 Mercedes GLS 450 key fob use? It uses a CR2032 battery.
Do I need to reprogram my key fob after replacing the battery? Usually, no. However, if the key fob doesn’t work after replacement, re-synchronization might be necessary.
Where can I buy a replacement battery? CR2032 batteries are readily available online, in electronics stores, and often in supermarkets.
How long does a key fob battery typically last? It can vary depending on usage, but generally, a key fob battery lasts 2-3 years.
What should I do if my key fob still doesn’t work after replacing the battery? Contact a qualified automotive locksmith or your Mercedes dealership.

Common Situations

Key fob completely unresponsive: This can indicate a dead battery, but it can also be a sign of a faulty key fob. Try replacing the battery first.
Key fob works intermittently: This is often a sign of a dying battery. Replace it as soon as possible.
Key fob buttons are sticky: This can indicate dirt or debris inside the key fob. Try cleaning the buttons and contacts.

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