1. How to Change the Battery in a Mercedes Remote Key

Mercedes remote key

Sustaining a useful Mercedes distant secret’s important for the comfort and safety of your car. One of many essential elements of key upkeep is changing the battery when it runs low. The method of adjusting the battery in a Mercedes distant secret’s comparatively easy however requires a couple of easy steps. This information will give you detailed directions on methods to successfully substitute the battery in your Mercedes distant key, guaranteeing its continued operation and your peace of thoughts.

Earlier than embarking on the battery alternative course of, collect the mandatory instruments and supplies. You will have a brand new CR2025 battery, a small flat-head screwdriver or key, and a clear work floor. Moreover, it is advisable to have a smooth material or tissue available to stop scratches or harm to the important thing elements. Upon getting every part you want, comply with the steps outlined under to switch the battery and restore the performance of your Mercedes distant key.

Find the small notch or launch button on the again of the important thing fob. Utilizing the flat-head screwdriver or key, fastidiously pry open the important thing housing, taking care to not harm the casing or inside elements. As soon as the housing is open, you will note the outdated battery secured in its designated slot. Gently take away the outdated battery and substitute it with the brand new CR2025 battery, guaranteeing the optimistic (+) aspect of the battery faces upward. Safe the brand new battery in place, shut the important thing housing, and press firmly to make sure it snaps shut securely. Take a look at the important thing fob to confirm that it capabilities accurately, and also you’re all set. Keep in mind to eliminate the outdated battery responsibly.

Prepping for Battery Alternative

Collect the Obligatory Provides

Earlier than embarking in your distant key battery alternative journey, guarantee you might have the next necessities at hand:

  • New battery (examine your car’s handbook for the suitable kind and measurement)
  • Small Phillips-head screwdriver
  • Flathead screwdriver or a spudger
  • Clear, lint-free material
  • Non-obligatory: Magnifying glass (for improved visibility in small areas)


Tip: Take into account buying a set of alternative batteries particularly designed for Mercedes distant keys. These batteries are sometimes pre-sized and include the right terminals, making the alternative course of smoother.


Security Precautions: Deal with the small battery elements with care, avoiding contact with moisture or excessive temperatures. Eliminate the outdated battery responsibly in response to native laws.

Figuring out the Battery Sort

Figuring out the right battery kind is essential for the right functioning of your Mercedes distant key. Listed below are some steps to information you:

  1. Examine the Proprietor’s Handbook: The proprietor’s handbook in your Mercedes will sometimes specify the battery kind required for the distant key.
  2. Study the Battery Housing: Open the battery housing of the distant key and thoroughly study the imprint or marking on the battery. This normally signifies the battery kind.
  3. Confer with the Battery Reference Chart: If the battery housing doesn’t present a transparent indication of the battery kind, seek the advice of a battery reference chart. This chart matches frequent battery sizes with their corresponding codes. Here’s a desk in your reference:
  4. Battery Code Battery Measurement Suitable Mercedes Fashions
    CR2025 20mm diameter, 2.5mm thickness Most Mercedes fashions
    CR2032 20mm diameter, 3.2mm thickness Choose Mercedes fashions (e.g., S-Class, G-Class)
  5. Cross-Reference with On-line Sources: Make the most of on-line automotive battery web sites or boards to cross-reference your Mercedes mannequin and yr with the corresponding battery kind.

Finding the Key’s Battery Compartment

Figuring out the particular location of the battery compartment in Mercedes distant keys varies relying on the mannequin. Nevertheless, common tips might help you navigate the method.

Older Fashions (Pre-2010)

For older Mercedes fashions manufactured earlier than 2010, the battery compartment is usually discovered by following these steps:

  • **Examine the Sides:** Study the edges of the distant key for any seen battery compartment doorways or slots.
  • **Find the Launch Button:** If no exterior compartment is seen, search for a small launch button on the important thing’s physique. Urgent this button ought to slide out the battery tray.
  • **Use a Flathead Screwdriver:** In some instances, a flathead screwdriver could also be required to pry open the battery compartment. Rigorously insert the screwdriver into a delegated slot or crevice and gently apply strain to launch the compartment.
Mannequin Vary Battery Compartment Location
W202 (C-Class) Hidden compartment accessible through launch button
W208 (CLK) Compartment situated on the again of the important thing
W210 (E-Class) Detachable battery tray launched by a spring-loaded button

Safely Opening the Compartment

Opening the battery compartment in your Mercedes distant key requires cautious dealing with to keep away from damaging the important thing or its inside elements. Comply with these steps for a protected opening:

  1. **Find the Launch Button:** Discover the small launch button or lever on the again or aspect of the important thing.
  2. **Gently Press and Slide:** Press the discharge button and concurrently slide the important thing aside into two halves.
  3. **Separate the Halves:** Rigorously pull the halves aside to disclose the battery compartment.
  4. **Use a Spudger or Small Instrument (Non-obligatory):** If the battery compartment is tight or caught, use a plastic spudger or small software to softly pry it open. By no means use sharp objects or extreme pressure that would повредить the important thing.

**Notice:** Some Mercedes distant keys have a special opening mechanism, equivalent to a hinged design or a push-button launch. Confer with your car’s proprietor’s handbook or seek the advice of a licensed Mercedes dealership for particular directions on methods to open your key’s battery compartment.

Here’s a desk summarizing the steps for safely opening the battery compartment:

Step Description
1 Find the discharge button on the important thing.
2 Press the discharge button and slide the important thing aside.
3 Gently pull the halves aside to disclose the battery compartment.

Eradicating the Depleted Battery

To take away the depleted battery out of your Mercedes distant key, comply with these detailed steps:

  1. Find the battery cowl: The battery cowl is usually situated on the again or backside of the important thing.
  2. Insert a small software: Use a small, flat-head screwdriver or key to insert into the slot on the battery cowl.
  3. Pry open the duvet: Gently pry the duvet open and elevate it off the important thing.
  4. Take away the outdated battery: The depleted battery must be seen as soon as the duvet is eliminated. Use a small software to softly take away it from its housing.
  5. Examine the terminals: Earlier than inserting the brand new battery, examine the terminals on the important thing and the battery for any corrosion or harm. If any is current, clear the terminals utilizing a cotton swab dipped in rubbing alcohol.
Battery Sort Location
CR2025 Again of the important thing
CR2032 Backside of the important thing

Inserting the New Battery

1. With the important thing held the other way up in your hand, find the small notch above the metallic key.
2. Insert the tip of a small flathead screwdriver or different appropriate software into the notch and gently pry the 2 halves of the important thing aside on the notch.
3. Rigorously separate the 2 halves of the important thing, taking care to not harm the circuit board or different elements inside.
4. Find the battery compartment inside one half of the important thing. The battery might be held in place by a small metallic clip.
5. Use a small screwdriver or different software to fastidiously take away the battery from its compartment.
6. Be aware of the orientation of the battery within the compartment. The optimistic (+) terminal of the battery must be going through up in the direction of the circuit board. In case you’re unsure which terminal is optimistic, consult with the markings on the battery itself or the diagram within the proprietor’s handbook in your particular Mercedes mannequin.

Battery Sort Mercedes Fashions
CR2025 Most Mercedes fashions, together with C-Class, E-Class, S-Class, and G-Class
CR2032 Some newer Mercedes fashions, together with the A-Class, CLA-Class, and GLA-Class

7. Insert the brand new battery into the compartment, ensuring that the optimistic (+) terminal is going through up.
8. Safe the battery in place with the metallic clip.
9. Reassemble the 2 halves of the important thing, ensuring that the snaps or clips interact securely.

Closing the Battery Compartment

As soon as the brand new battery is in place, it is time to shut the battery compartment. This is an in depth information to make sure a safe and correct closure:

1. Align the Battery Cowl:

Align the battery cowl with the grooves or slots on the important thing fob’s physique.

2. Slide the Cowl Again:

Rigorously slide the battery cowl again into its authentic place. It ought to match snugly and with none gaps.

3. Examine for Resistance:

Gently press down on the battery cowl to examine for any resistance. If there is not any resistance, it is possible that the duvet is correctly seated.

4. Safe the Cowl:

Use a small screwdriver or a key to safe the battery cowl in place. Tighten the screws or clips as crucial, however keep away from over-tightening.

5. Examine the Compartment:

Visually examine the battery compartment to make sure that the duvet is absolutely closed and there aren’t any free wires or elements.

6. Take a look at the Key:

Press the buttons on the important thing fob to check if it is working correctly. The lights ought to illuminate, and the buttons ought to reply as anticipated.

7. Retailer the Key Safely:

Maintain the Mercedes distant key in a protected and dry place to stop harm and untimely battery drain. Keep away from exposing it to excessive temperatures or liquids.

Verifying Performance

As soon as the battery has been changed, it is essential to confirm the performance of the distant key to make sure it is working accurately. Listed below are the steps to comply with:

Step 1: Insert the Key

Insert the distant key into the ignition of your Mercedes car.

Step 2: Flip the Key

Flip the important thing to the “On” place, however don’t begin the engine.

Step 3: Press the Key Buttons

Press every button on the distant key, together with the lock, unlock, trunk launch, and panic buttons.

Step 4: Observe the Lights

As you press every button, observe the indicator lights on the dashboard. They need to illuminate briefly to point that the button is functioning.

Step 5: Take a look at the Distant Options

Exit the car and take a look at the distant key’s options. Stand at a distance from the automotive and press the lock and unlock buttons to confirm in the event that they work.

Step 6: Examine the Vary

Stroll additional away from the car and take a look at the vary of the distant key. The important thing ought to work even at an inexpensive distance.

Step 7: Examine the Battery Contacts

If the distant key just isn’t functioning correctly, examine the battery contacts inside the important thing fob. Guarantee they’re clear and making good contact with the battery.

Step 8: Troubleshooting

If the distant key nonetheless fails to work after following all of the steps above, there could also be an underlying situation. Take into account the next troubleshooting steps:

a. Reset the Distant Key:

Confer with your car’s proprietor’s handbook for directions on resetting the distant key.

b. Examine the Antenna:

The receiver antenna for the distant key could also be broken or obstructed. Examine it for any points.

c. Change the Distant Key Battery:

Although you might have simply changed the battery, it is doable that the brand new battery is flawed. Attempt changing it with one other new battery.

d. Search Skilled Help:

If all else fails, chances are you’ll want to hunt skilled help from a Mercedes-Benz dealership or a certified automotive locksmith.

Correct Battery Disposal

It is necessary to eliminate your outdated distant key battery correctly to keep away from environmental contamination. Listed below are some tips:

  1. Examine Native Laws: Totally different areas might have particular laws for battery disposal. Examine together with your native authorities for any particular directions.
  2. Recycle: Many recycling facilities settle for button batteries. Discover a close by recycling middle and drop off your outdated battery.
  3. Dispose at Electronics Shops: Some electronics shops, equivalent to Finest Purchase, supply battery recycling applications. Examine together with your native retailer for particulars.
  4. Mail-Again Applications: Sure producers supply mail-back applications for battery disposal. Contact the producer for extra data.
  5. Cowl Terminals: Earlier than disposing, cowl the battery terminals with tape to stop unintentional contact and quick circuits.
  6. Landfills: As a final resort, chances are you’ll eliminate the battery in a delegated landfill. Guarantee it is securely wrapped and comply with any security tips.
Disposal Methodology Benefits Disadvantages
Recycling Eco-friendly, prevents environmental hurt Will not be broadly obtainable
Electronics Shops Handy, typically freed from cost Might not settle for all forms of batteries
Mail-Again Applications Handy, ensures protected disposal May be time-consuming, might contain transport prices

Take away the Emergency Key

Find the small launch button on the aspect of the important thing fob. Press it, and you can slide the emergency key out.

Open the Key Fob

Insert the emergency key into the notch on the again of the important thing fob. Gently pry open the 2 halves of the important thing fob.

Find the Battery

The battery is normally situated within the middle of the important thing fob. It is a small, spherical battery, normally a CR2025 or CR2032.

Take away the Outdated Battery

Use a small screwdriver or your fingernail to softly pry the outdated battery out of its socket.

Insert the New Battery

Insert the brand new battery into the socket, ensuring that the optimistic (+) aspect of the battery is going through up.

Shut the Key Fob

Snap the 2 halves of the important thing fob again collectively. Ensure that they click on into place securely.

Take a look at the Key Fob

Press a button on the important thing fob to make it possible for it really works. If it would not, examine that the battery is inserted accurately and that the important thing fob is closed correctly.

Further Ideas for Upkeep

Maintain the important thing fob clear. Dust and particles can get into the important thing fob and trigger it to malfunction.

Do not expose the important thing fob to excessive temperatures. Warmth and chilly can harm the battery and the electronics.

Do not drop the important thing fob. Dropping the important thing fob can harm the inner elements.

Change the battery usually. The battery in a Mercedes key fob sometimes lasts for about two years. It is a good suggestion to switch the battery earlier than it dies fully.

In case you’re having bother together with your Mercedes key fob, you possibly can take it to a Mercedes dealership or a certified locksmith.

How To Change Battery In Mercedes Distant Key

Step 1: Find the important thing launch button on the again of the distant key. It is normally a small, spherical button with the Mercedes-Benz brand on it.

Step 2: Press the important thing launch button and pull the important thing out of the distant.

Step 3: Use a small screwdriver or your fingernail to pry open the again of the distant key.

Step 4: Find the battery contained in the distant key. It is normally a small, spherical battery with a optimistic (+) and destructive (-) terminal.

Step 5: Use a small screwdriver or your fingernail to pry the battery out of the distant key.

Step 6: Insert the brand new battery into the distant key, ensuring that the optimistic (+) terminal is going through up.

Step 7: Snap the again of the distant key again into place.

Step 8: Insert the important thing again into the distant key.

Folks additionally ask about How To Change Battery In Mercedes Distant Key

What kind of battery does a Mercedes distant key use?

Mercedes distant keys sometimes use a CR2025 battery.

How typically ought to I alter the battery in my Mercedes distant key?

The battery in a Mercedes distant key must be modified each 2-3 years.

How do I do know if the battery in my Mercedes distant secret’s useless?

If the battery in your Mercedes distant secret’s useless, you won’t be able to unlock or begin your automotive. The distant key can also not gentle up while you press the buttons.