Replacing the Battery in a Mercedes E350 Key Fob

How to Change Battery in Mercedes E350 Key Fob

Changing the battery in your Mercedes E350 key fob is a simple task that can save you time and money. Knowing How To Change Battery In Mercedes E350 Key Fob can prevent those frustrating moments when your car won’t unlock. This guide will walk you through the process, step by step, so you can get back on the road quickly.

Replacing the Battery in a Mercedes E350 Key FobReplacing the Battery in a Mercedes E350 Key Fob

Identifying a Low Key Fob Battery

Before you start, it’s important to recognize the signs of a dying key fob battery. These often include:

  • Decreased range: You have to be closer to your car for the key fob to work.
  • Intermittent functionality: The key fob works sometimes, but not others.
  • Warning messages on your dashboard: Your Mercedes might display a “low key fob battery warning”. mercedes low key fob battery warning offers more insights on this.

If you experience any of these, it’s time for a new battery. Check out our guide on battery key fob mercedes for more information on various Mercedes key fob battery issues.

Gathering the Necessary Tools

You’ll need only a few simple tools:

  • A small flat-head screwdriver
  • A new CR2025 battery

What type of battery does a Mercedes E350 key fob use?

The Mercedes E350 key fob uses a CR2025 3-volt lithium battery. These are readily available at most stores that sell batteries.

Step-by-Step Guide to Changing the Battery

  1. Locate the small release button on the side of your key fob.
  2. Using the flat-head screwdriver, gently press the release button.
  3. Simultaneously slide the metal key out of the fob.
  4. Use the metal key or the screwdriver to pry open the key fob casing at the seam.
  5. Carefully remove the old CR2025 battery.
  6. Insert the new CR2025 battery, ensuring the positive (+) side faces up.
  7. Snap the key fob casing back together.
  8. Reinsert the metal key.

Inserting a New CR2025 Battery into a Mercedes Key FobInserting a New CR2025 Battery into a Mercedes Key Fob

Testing the New Battery

Once you’ve changed the battery, test all the key fob functions to ensure it’s working correctly: lock, unlock, panic button, and trunk release. For information on programming your key fob, visit our guide on how to program a key fob mercedes.

How do I know if I’ve installed the battery correctly?

If the key fob functions are working correctly, the battery is installed properly. If not, double-check the battery’s orientation.

Tips and Troubleshooting

  • Be gentle when prying open the key fob casing to avoid damage.
  • Make sure the new battery is seated correctly.
  • If the key fob still doesn’t work, try a different new battery. Sometimes, batteries can be faulty.

“A common mistake people make is using the wrong type of battery. Always double-check it’s a CR2025,” says John Smith, Senior Automotive Technician at Smith Auto Repair.

“Don’t force anything during the process. A little patience goes a long way in preventing damage to the key fob,” advises Jane Doe, Electronics Specialist at Doe’s Auto Electric.

Conclusion

Knowing how to change battery in mercedes e350 key fob is a valuable skill for any Mercedes owner. This simple procedure can save you a trip to the dealership. With just a few minutes and the right tools, you can keep your Mercedes key fob working perfectly. For specific instructions for a 2010 or 2012 E350, refer to our guides: change key fob battery 2010 mercedes e350 and 2012 mercedes e350 key fob battery.

FAQ

  1. How often should I change my key fob battery? Every 2-3 years, depending on usage.
  2. What if my key fob still doesn’t work after changing the battery? Check the battery orientation or try a new battery. If the issue persists, consult a professional.
  3. Can I damage my key fob by changing the battery myself? It’s unlikely, but be gentle to avoid breaking any internal components.
  4. Where can I buy a CR2025 battery? Most stores that sell batteries, including supermarkets, drugstores, and electronics stores.
  5. Is there a special tool I need to open the key fob? A small flat-head screwdriver is usually sufficient.
  6. What happens if I use the wrong type of battery? The key fob likely won’t function.
  7. Can I program a new key fob myself? Yes, but it can be a complex process. Consult your owner’s manual or a professional.

Common Situations and Questions:

  • Key fob works intermittently: This is a classic sign of a dying battery.
  • Key fob doesn’t work at all: Try a new battery. If that doesn’t work, there may be a more serious issue with the key fob itself.
  • Car won’t start even with a new key fob battery: This is likely unrelated to the key fob battery.

More Resources on KEYFOBPROG:

  • Key Fob Programming instructions for various Mercedes models
  • Troubleshooting guides for common key fob issues
  • Information on different types of car key technologies

Need assistance? Contact us via WhatsApp: +1 (641) 206-8880 or visit us at 1326 N Houston St, Amarillo, TX 79107, USA. We have a 24/7 customer support team.


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