2017 Mercedes Benz Key Fob Battery: Everything You Need to Know

Experiencing issues with your 2017 Mercedes Benz key fob? Before you schedule a pricey dealership visit, a simple battery replacement could be the solution. This comprehensive guide covers everything you need to know about your 2017 Mercedes Benz Key Fob Battery, from identifying signs of a dying battery to replacing it yourself.

Recognizing a Dying Key Fob Battery

Just like your car battery, your key fob battery relies on a small charge to operate. Over time, this charge depletes, eventually requiring a replacement. Here are some telltale signs that your 2017 Mercedes Benz key fob battery might be nearing its end:

Decreased Range: Are you noticing that you need to be closer to your car for the key fob to unlock the doors or activate the trunk? This reduced range is often an early indication of a weakening battery.
Intermittent Functionality: Does your key fob work sporadically, sometimes requiring multiple presses to register? This inconsistent behavior suggests the battery might not be delivering a consistent charge.
Warning Messages: Some Mercedes Benz models display a “Key Fob Battery Low” warning message on the dashboard, providing a clear alert that a replacement is needed.
Physical Inspection: If you notice any corrosion or damage to the battery terminals inside your key fob, it’s a clear indicator that a battery replacement is necessary.

Replacing Your 2017 Mercedes Benz Key Fob Battery: A Step-by-Step Guide

Replacing the battery in your 2017 Mercedes Benz key fob is a relatively simple process that you can do at home with a few tools. Here’s how:

Gather Your Materials: You’ll need a small flat-head screwdriver, a new CR2032 battery (widely available online or at most stores that sell batteries), and your Mercedes Benz key fob.
Locate the Battery Compartment: On the back of your key fob, you’ll find a small release button or a slot. Use the flat-head screwdriver to gently press the release button or insert it into the slot and carefully pry open the battery compartment cover.
Remove the Old Battery: Once the compartment is open, carefully remove the old CR2032 battery. Note the battery’s orientation for correct placement of the new battery.
Install the New Battery: Insert the new CR2032 battery into the compartment, ensuring it’s positioned the same way as the old battery.
Reassemble the Key Fob: Align the cover of the battery compartment and press it firmly back into place until you hear a click.
Test Your Key Fob: Try locking and unlocking your car doors, opening the trunk, and starting the engine to ensure your key fob is functioning correctly with the new battery.

Expert Tip from John Miller, Automotive Electrician: “When handling the new CR2032 battery, avoid touching the flat surfaces. This helps to prevent transferring oils from your skin, which could potentially shorten the battery’s lifespan.”

What If My Key Fob Still Doesn’t Work?

If you’ve replaced the battery and your 2017 Mercedes Benz key fob is still not working correctly, there might be other underlying issues. Here are some possibilities:

Key Fob Programming: In some cases, your key fob might need to be reprogrammed to your Mercedes Benz vehicle. This typically requires specialized equipment and is best handled by a qualified automotive locksmith or dealership.
Antenna Issues: Your Mercedes Benz relies on an antenna system to communicate with your key fob. A faulty antenna in either the key fob or the vehicle can prevent proper signal transmission.
Internal Key Fob Damage: If your key fob has been dropped or exposed to water damage, there might be internal component damage affecting its functionality.

Expert Insight from Sarah Thompson, Senior Mechanic: “While replacing the battery yourself is a great way to save money, if you experience persistent issues with your key fob, it’s always best to consult a trusted professional for diagnosis and repair.”

Maintaining Your Mercedes Benz Key Fob

Taking a few simple precautions can help prolong the life of your key fob battery and keep it functioning optimally:

Avoid Extreme Temperatures: Exposing your key fob to extreme heat or cold can impact battery performance and lifespan. Avoid leaving it in direct sunlight or in freezing temperatures.
Keep it Dry: Moisture and electronic devices don’t mix. Ensure your key fob is kept dry and free from water damage.
Handle with Care: Dropping your key fob frequently can lead to internal damage, potentially affecting the battery and other components.

Conclusion

Replacing a dead battery in your 2017 Mercedes Benz key fob is a quick and easy DIY task. By following the steps outlined above, you can save yourself a trip to the dealership and get back to enjoying the convenience of your keyless entry system. Remember, if you encounter any difficulties or suspect other issues with your key fob, it’s always best to consult a qualified professional.

FAQs about 2017 Mercedes Benz Key Fob Batteries

Q: What type of battery does a 2017 Mercedes Benz key fob use?

A: The 2017 Mercedes Benz key fob uses a CR2032 battery, a common type of lithium coin battery.

Q: How long does a Mercedes Benz key fob battery last?

A: The lifespan of a Mercedes Benz key fob battery can vary depending on usage and other factors, but they typically last between 3 to 5 years.

Q: Can I drive my Mercedes Benz with a low key fob battery?

A: Yes, you can usually start and drive your Mercedes Benz with a low key fob battery as long as the key fob is within close proximity to the vehicle to allow for signal recognition. However, it’s essential to replace the battery as soon as possible to avoid any inconvenience.

Q: How much does it cost to replace a Mercedes Benz key fob battery at a dealership?

A: The cost of replacing a Mercedes Benz Key Fob battery at a dealership can vary, but you can expect to pay around $20 to $50, depending on your location and the specific dealership.

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