Automobile keys are an important a part of our every day lives. We use them to unlock our automobiles, begin our engines, and even open our trunks. However what occurs when the battery in our automobile key dies? Don’t be concerned, changing the battery in a Mercedes-Benz key’s a comparatively easy course of that may be completed in only a few minutes.
First, you may want to assemble just a few instruments. You may want a small screwdriver, a brand new battery, and a clear fabric. After getting your instruments, you possibly can start the method of changing the battery. Begin by eradicating the again of the important thing fob. This may be completed by inserting the screwdriver into the small slot on the again of the fob and gently prying it open. As soon as the again is eliminated, you may see the battery. Use the screwdriver to rigorously take away the previous battery and substitute it with the brand new one. Make sure that to insert the brand new battery within the appropriate course. As soon as the brand new battery is in place, put the again of the important thing fob again on and screw it into place.
Now that you have changed the battery, take a look at the important thing fob to ensure it is working correctly. Press the buttons on the fob and be sure that the lights flash and the automobile responds. If the important thing fob isn’t working correctly, examine to be sure that the battery is inserted accurately. If the important thing fob nonetheless doesn’t work, you might have to take it to a locksmith or dealership to have it repaired.
Figuring out the Key Battery Location
Accessing the Key Battery
The important thing battery for a Mercedes-Benz is usually positioned inside the important thing fob. To entry the battery, you will want to find the important thing launch button and press it to launch the important thing from the fob.
Finding the Key Fob
The important thing fob is normally connected to the important thing ring and will have a Mercedes-Benz emblem or the three-pointed star emblem on it. It may be made of varied supplies, together with plastic, metallic, or leather-based.
After getting recognized the important thing fob, you will want to find the important thing launch button. This button is usually positioned on the aspect of the fob and will have an arrow or triangle image subsequent to it.
Urgent the important thing launch button will launch the important thing from the fob. The important thing battery is normally positioned inside the important thing itself, behind a small cowl or panel.
Eradicating the Key Battery Cowl
Relying on the Mercedes-Benz key mannequin, the important thing battery cowl could also be secured with a screw or a snap-on mechanism.
| Key Kind | Battery Cowl |
|---|---|
| Commonplace Key | Screwed-on cowl |
| Sensible Key | Snap-on cowl |
If the quilt is screwed on, you will want a small screwdriver to take away it. If the quilt is snap-on, gently pry it open with a small flathead screwdriver or a skinny device.
As soon as the quilt is eliminated, it is possible for you to to entry the important thing battery. The battery is normally held in place by a small spring or clip.
Gathering the Mandatory Instruments
To efficiently substitute the important thing battery to your Mercedes-Benz, you will want sure important instruments. Firstly, guarantee you could have a brand new CR2025 battery, which is the usual battery kind utilized in Mercedes-Benz key fobs. Moreover, you’ll require the next instruments:
Flathead Screwdriver
A flathead screwdriver is essential for prying open the important thing fob. Select one that’s small and skinny sufficient to suit into the slender grooves of the important thing fob. A precision screwdriver set is beneficial, because it offers a wide range of sizes to accommodate totally different key fob fashions.
Key Extractor Instrument
In case your Mercedes-Benz key fob has an emergency mechanical key, you will want a key extractor device. This device helps to take away the mechanical key from the important thing fob to realize entry to the battery compartment. It’s a specialised device that’s particularly designed for Mercedes-Benz key fobs.
| Instrument | Function |
|---|---|
| CR2025 Battery | Substitute battery |
| Flathead Screwdriver | Prying open the important thing fob |
| Key Extractor Instrument | Eradicating the mechanical key (if relevant) |
Safely Opening the Key Casing
Step 1: Establish the Launch Button
Find the small launch button on the aspect or again of the important thing fob. It is normally flush with the floor and will have a logo or arrow subsequent to it.
Step 2: Apply Stress and Slide
Concurrently press and maintain the discharge button whereas gently sliding the important thing casing open within the course indicated by the button.
Step 3: Rigorously Separate the Halves
As soon as you’ve got efficiently slid the casing open, be further cautious when separating the 2 halves. Delicate inner parts and is derived could also be current, so deal with them with care to keep away from harm.
|
Key Kind |
Battery Kind |
Battery Orientation |
|---|---|---|
|
Flip Key |
CR2032 |
Constructive aspect (+) |
|
Sensible Key |
CR2025 |
Unfavourable aspect (-) |
|
Keyless Comfort System (KCS) |
CR2016 |
Constructive aspect (+) |
Eradicating the Outdated Battery
After getting positioned the important thing battery, it’s essential to take away the previous battery. This is learn how to do it:
-
Pry open the important thing fob. You should utilize a small flathead screwdriver or a key to pry open the important thing fob. Watch out to not harm the fob.
-
Find the battery. The battery is normally positioned inside the important thing fob, close to the circuit board.
-
Take away the battery. Use a small flathead screwdriver or a key to softly pry the battery out of the fob.
-
Clear the battery contacts. Use a cotton swab or a clear fabric to wash the battery contacts inside the important thing fob. It will assist guarantee a great reference to the brand new battery.
Battery Substitute Desk
| Mercedes-Benz Key Mannequin | Battery Kind |
|---|---|
| Sensible Key | CR2025 |
| Flip Key | CR2016 |
Inserting the New Battery
5. Inserting the brand new battery:** Now that the previous battery is eliminated, it is time to insert the brand new one. Begin by holding the battery with the unfavorable terminal dealing with you, and align it with the battery compartment. Gently press down on the battery till it makes contact with the terminals. Then, rigorously press the optimistic terminal into place, and safe the battery with the retaining clip.
- Take note of the polarity:** Guarantee that the optimistic terminal on the battery matches the optimistic terminal within the battery compartment. Incorrect polarity can harm your automobile’s electrical system.
– Double-check the match:** Earlier than securing the battery, double-check that it suits snugly within the compartment and does not transfer while you press on it.
– Tighten the retaining clip:** Rigorously tighten the retaining clip to safe the battery in place. Overtightening can harm the clip or the battery, so use warning.
Reassembling the Key Casing
Step 6: Reattach the Key Blade (Elective)
For those who eliminated the important thing blade throughout disassembly, now could be the time to reattach it. Maintain the important thing blade by the bottom and gently insert it into the slot on the important thing casing. Press firmly till it clicks into place. You could have to align the important thing blade with the casing by turning it barely as you insert it.
Step 6.1: Test if the Key Locks and Unlocks
As soon as the important thing blade is reattached, take a look at the important thing to make sure it locks and unlocks your Mercedes-Benz. Insert the important thing into the door lock and switch it to the lock place. Then, flip it to the unlock place. The door ought to reply easily and with none resistance. Repeat the method on the opposite doorways and the trunk or tailgate to confirm the secret is functioning accurately.
Step 6.2: Change the Battery Cowl
After getting confirmed the secret is working, substitute the battery cowl. Align the quilt with the important thing casing and gently press it into place. Guarantee the quilt totally snaps into place and is safe. Your key’s now reassembled and able to use.
Testing the Key Performance
Earlier than changing the important thing battery, take a look at the important thing performance to substantiate that the battery is certainly the issue.
To do that, maintain the important thing near your Mercedes-Benz and press the lock or unlock button. If the automobile responds, the battery is probably going nonetheless useful and you might not want to exchange it.
If the automobile doesn’t reply, strive urgent the button a number of instances. If the automobile nonetheless doesn’t reply, the battery could also be fully lifeless and you will want to exchange it.
Further Suggestions
Listed below are some further suggestions for testing the important thing performance:
- When you’ve got a spare key, strive utilizing that key to unlock or lock the automobile. If the spare key works, the issue is probably going with the unique key and never the automobile’s battery.
- Strive utilizing the important thing to unlock or lock the automobile from totally different distances. If the important thing solely works when it is extremely near the automobile, the battery could also be weak and needs to be changed.
- When you’ve got a keyless entry system, strive utilizing the important thing fob to unlock or lock the automobile. If the important thing fob doesn’t work, the battery in the important thing fob could also be lifeless and needs to be changed.
Eradicating the Key Battery
Find the important thing battery by eradicating the important thing blade. Use a small flathead screwdriver or a key extractor device to softly pry open the important thing fob.
As soon as the important thing fob is open, establish the battery. It’s normally a small, spherical, silver battery with a mannequin quantity printed on it. Gently pry the battery out of its housing with a small screwdriver or a pair of tweezers.
Inserting the New Battery
Test the brand new battery to make sure it’s the appropriate kind and orientation. Insert the brand new battery into the housing, optimistic aspect up. Gently press the battery into place till it clicks.
Reassembling the Key Fob
Reassemble the important thing fob by snapping the 2 halves again collectively. Guarantee the important thing blade is accurately aligned and inserted into the important thing fob.
Programming the Key (IfNeeded)
If the brand new battery doesn’t work, the important thing might should be reprogrammed. This course of could be carried out by a Mercedes-Benz dealership or a professional automotive locksmith.
Listed below are the steps concerned in programming a Mercedes-Benz key:
- Insert the brand new key into the ignition and switch it to the “On” place.
- Look ahead to the anti-theft system gentle to show off.
- Inside 60 seconds, press and maintain the “Unlock” button on the important thing fob for 20 seconds.
- Launch the “Unlock” button and instantly press the “Lock” button for 20 seconds.
- Repeat steps 3 and 4 for the opposite key fobs.
- Flip off the ignition and await the anti-theft system gentle to show off once more.
- Take away the important thing from the ignition and take a look at it to start out the automobile.
- If the important thing begins the automobile, the programming course of is full.
If the important thing nonetheless doesn’t work after programming, it could be crucial to exchange the important thing fob or the ignition swap.
Key Battery Kind Mercedes-Benz Fashions CR2025 E-Class, C-Class, S-Class, G-Class, CLK-Class CR2032 A-Class, B-Class, CLA-Class, GLA-Class Battery Location
The important thing battery is normally positioned inside the important thing fob or distant. Search for a small button or launch latch on the perimeters or backside of the fob. As soon as you discover the discharge, press it and pull the important thing aside to disclose the battery.
Battery Kind
Most Mercedes-Benz keys use a CR2025 or CR2032 coin cell battery. Test the battery compartment or person handbook for the particular kind required.
Battery Substitute Steps
- Press the discharge button or latch to open the important thing fob.
- Find the battery compartment and take away the previous battery.
- Insert the brand new battery with the optimistic aspect (+) dealing with up.
- Shut the battery compartment and reassemble the important thing fob.
Troubleshooting Battery Substitute Points
Battery Nonetheless Not Working After Substitute
If the important thing nonetheless does not work after changing the battery, strive the next:
- Make sure that the brand new battery is the proper kind and is inserted accurately.
- Test the battery contacts in the important thing fob and clear them if they’re soiled.
- Strive resetting the important thing by holding the unlock button for 10 seconds.
- Test if there are any free or damaged parts inside the important thing fob.
- If none of those steps work, you might have to have the important thing fob programmed by a locksmith or dealership.
Key Fob Not Opening or Closing the Automobile
If the important thing fob isn’t opening or closing the automobile, strive the next:
- Make sure that the important thing fob is inside vary of the automobile.
- Test if the automobile battery is lifeless or disconnected.
- Strive syncing the important thing fob with the automobile by following the directions within the person handbook.
- When you’ve got a spare key, strive utilizing it to open and shut the automobile.
- If none of those steps work, you might have to have the important thing fob or automobile receiver recognized by a mechanic.
Key Fob Battery Draining Shortly
If the important thing fob battery is draining rapidly, strive the next:
- Make sure that the important thing fob isn’t getting used excessively.
- Test for any free or worn parts in the important thing fob.
- Strive changing the battery with a brand new one.
- If the battery nonetheless drains rapidly, you might have to have the important thing fob recognized by a mechanic.
Further Security Precautions
1. Keep away from Contact with Battery Acid
The battery acid in Mercedes-Benz key fobs is extremely corrosive and may trigger pores and skin irritation and chemical burns. Put on gloves when dealing with the battery, and keep away from contact together with your pores and skin or eyes.
2. Do Not Brief Circuit the Battery
Brief-circuiting the battery could cause it to overheat and explode. Don’t contact the optimistic and unfavorable terminals of the battery with metallic objects, equivalent to instruments or jewellery.
3. Use the Right Battery
Mercedes-Benz key fobs require a selected kind of battery. Utilizing the incorrect battery can harm the important thing fob or trigger it to malfunction. Consult with your automobile’s proprietor’s handbook for the proper battery specs.
4. Eliminate Batteries Correctly
Used batteries needs to be disposed of correctly to stop environmental contamination. Don’t throw them away within the trash; as an alternative, recycle them at a delegated battery disposal facility.
5. Preserve Batteries Away from Kids and Pets
Batteries could be harmful if ingested or ingested. Preserve them out of attain of kids and pets to stop unintended damage.
6. Do Not Retailer Batteries in Excessive Temperatures
Excessive warmth or chilly can harm batteries. Retailer them in a cool, dry place away from direct daylight.
7. Clear the Battery Contacts
Over time, the battery contacts can change into soiled or corroded. Clear them with a cotton swab and rubbing alcohol to make sure good electrical contact.
8. Examine the Key Fob
Earlier than changing the battery, examine the important thing fob for any harm or put on. If there are any cracks, damaged buttons, or different issues, it could be crucial to exchange the important thing fob as an alternative of simply the battery.
9. Take a look at the Key Fob
After changing the battery, take a look at the important thing fob to ensure it’s working correctly. Lock and unlock your automobile, and examine the vary and performance of the buttons.
10. Further Precautions for Sensible Key Fobs with Immobilizer
Sensible key fobs with immobilizer programs require further precautions:
- Use the Emergency Key: If the sensible key fob battery is lifeless, you should use the emergency mechanical key to unlock and begin your automobile.
- Keep away from Sturdy Magnets: Sturdy magnets can intervene with the immobilizer system. Preserve your sensible key fob away from magnets, equivalent to these utilized in laptop computer circumstances or fridge doorways.
- Retailer the Key Fob Individually: To forestall unintentional unlocking or beginning of the automobile, retailer the sensible key fob in a separate location from the automobile when not in use.
The way to Change Key Battery for Mercedes-Benz
Changing the battery in your Mercedes-Benz key fob is an easy activity that may be accomplished in only a few minutes. Listed below are the steps it’s essential to comply with:
1.
Find the small screw on the again of the important thing fob and use a screwdriver to take away it.
2.
Rigorously pry open the again of the important thing fob utilizing a small flat-head screwdriver or a butter knife.
3.
Find the battery and take away it from the important thing fob.
4.
Change the battery with a brand new one, ensuring that the optimistic and unfavorable terminals are aligned accurately.
5.
Shut the again of the important thing fob and tighten the screw.
6.
Take a look at the important thing fob to ensure it’s working correctly.
Folks Additionally Ask
What kind of battery does my Mercedes-Benz key fob use?
Most Mercedes-Benz key fobs use a CR2025 battery.
How usually do I want to exchange the battery in my Mercedes-Benz key fob?
The battery in your Mercedes-Benz key fob will usually final for 2-3 years.
Can I substitute the battery in my Mercedes-Benz key fob myself?
Sure, you possibly can substitute the battery in your Mercedes-Benz key fob your self. The steps are outlined above.
How do I do know if the battery in my Mercedes-Benz key fob is lifeless?
There are just a few indicators that the battery in your Mercedes-Benz key fob is lifeless, together with:
- The important thing fob does not work while you press the buttons.
- The important thing fob works intermittently.
- The important thing fob’s vary is lowered.
- The important thing fob’s LED gentle is dim or does not come on in any respect.
