Automobile keys are an important a part of our day by 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 automotive key dies? Don’t fret, changing the battery in a Mercedes-Benz key’s a comparatively easy course of that may be executed in only a few minutes.
First, you will want to collect a couple of instruments. You may want a small screwdriver, a brand new battery, and a clear fabric. Upon getting your instruments, you’ll be able to start the method of changing the battery. Begin by eradicating the again of the important thing fob. This may be executed 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 will see the battery. Use the screwdriver to rigorously take away the outdated battery and exchange it with the brand new one. Make certain to insert the brand new battery within the appropriate path. 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’ve got 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 automotive responds. If the important thing fob shouldn’t be working correctly, test to be sure that the battery is inserted appropriately. If the important thing fob nonetheless doesn’t work, you might must 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 often positioned inside the important thing fob. To entry the battery, you will have 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.
Upon getting recognized the important thing fob, you will have to find the important thing launch button. This button is often 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 have 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 Vital Instruments
To efficiently exchange the important thing battery in your Mercedes-Benz, you will have sure important instruments. In the beginning, guarantee you’ve got a brand new CR2025 battery, which is the usual battery sort 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 slim grooves of the important thing fob. A precision screwdriver set is really helpful, because it offers quite a lot of sizes to accommodate totally different key fob fashions.
Key Extractor Software
In case your Mercedes-Benz key fob has an emergency mechanical key, you will have 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.
| Software | Function |
|---|---|
| CR2025 Battery | Substitute battery |
| Flathead Screwdriver | Prying open the important thing fob |
| Key Extractor Software | 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 path indicated by the button.
Step 3: Rigorously Separate the Halves
As soon as you have efficiently slid the casing open, be additional cautious when separating the 2 halves. Delicate inner elements 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 |
Unfavorable aspect (-) |
|
Keyless Comfort System (KCS) |
CR2016 |
Constructive aspect (+) |
Eradicating the Previous Battery
Upon getting positioned the important thing battery, you might want to take away the outdated battery. This is find out how to do it:
-
Pry open the important thing fob. You should use 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. This can 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 outdated battery is eliminated, it is time to insert the brand new one. Begin by holding the battery with the adverse terminal going through 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 constructive terminal into place, and safe the battery with the retaining clip.
- Take note of the polarity:** Guarantee that the constructive terminal on the battery matches the constructive terminal within the battery compartment. Incorrect polarity can harm your automotive’s electrical system.
– Double-check the match:** Earlier than securing the battery, double-check that it matches snugly within the compartment and would not transfer if 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 (Non-compulsory)
For those who eliminated the important thing blade throughout disassembly, now’s 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 must align the important thing blade with the casing by turning it barely as you insert it.
Step 6.1: Verify 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 bottom line is functioning appropriately.
Step 6.2: Substitute the Battery Cowl
Upon getting confirmed the bottom line is working, exchange 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 automotive responds, the battery is probably going nonetheless useful and you might not want to exchange it.
If the automotive doesn’t reply, strive urgent the button a number of instances. If the automotive nonetheless doesn’t reply, the battery could also be utterly lifeless and you will have to exchange it.
Further Ideas
Listed here are some extra suggestions for testing the important thing performance:
- When you’ve got a spare key, strive utilizing that key to unlock or lock the automotive. If the spare key works, the issue is probably going with the unique key and never the automotive’s battery.
- Attempt utilizing the important thing to unlock or lock the automotive from totally different distances. If the important thing solely works when it is vitally near the automotive, the battery could also be weak and must be changed.
- When you’ve got a keyless entry system, strive utilizing the important thing fob to unlock or lock the automotive. If the important thing fob doesn’t work, the battery in the important thing fob could also be lifeless and must 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, determine 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
Verify the brand new battery to make sure it’s the appropriate sort and orientation. Insert the brand new battery into the housing, constructive 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 appropriately aligned and inserted into the important thing fob.
Programming the Key (IfNeeded)
If the brand new battery doesn’t work, the important thing could should be reprogrammed. This course of may be carried out by a Mercedes-Benz dealership or a professional automotive locksmith.
Listed here 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 mild 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 watch for the anti-theft system mild to show off once more.
- Take away the important thing from the ignition and take a look at it to begin the automotive.
- If the important thing begins the automotive, the programming course of is full.
If the important thing nonetheless doesn’t work after programming, it could be mandatory 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 edges 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. Verify the battery compartment or person handbook for the precise sort required.
Battery Substitute Steps
- Press the discharge button or latch to open the important thing fob.
- Find the battery compartment and take away the outdated battery.
- Insert the brand new battery with the constructive aspect (+) going through 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 would not work after changing the battery, strive the next:
- Make certain the brand new battery is the right sort and is inserted appropriately.
- Verify the battery contacts in the important thing fob and clear them if they’re soiled.
- Attempt resetting the important thing by holding the unlock button for 10 seconds.
- Verify if there are any unfastened or damaged elements inside the important thing fob.
- If none of those steps work, you might must have the important thing fob programmed by a locksmith or dealership.
Key Fob Not Opening or Closing the Automobile
If the important thing fob shouldn’t be opening or closing the automotive, strive the next:
- Make certain the important thing fob is inside vary of the automotive.
- Verify if the automotive battery is lifeless or disconnected.
- Attempt syncing the important thing fob with the automotive by following the directions within the person handbook.
- When you’ve got a spare key, strive utilizing it to open and shut the automotive.
- If none of those steps work, you might must have the important thing fob or automotive receiver identified by a mechanic.
Key Fob Battery Draining Rapidly
If the important thing fob battery is draining shortly, strive the next:
- Make certain the important thing fob shouldn’t be getting used excessively.
- Verify for any unfastened or worn elements in the important thing fob.
- Attempt changing the battery with a brand new one.
- If the battery nonetheless drains shortly, you might must have the important thing fob identified by a mechanic.
Further Security Precautions
1. Keep away from Contact with Battery Acid
The battery acid in Mercedes-Benz key fobs is very 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 may cause it to overheat and explode. Don’t contact the constructive and adverse terminals of the battery with metallic objects, akin to instruments or jewellery.
3. Use the Right Battery
Mercedes-Benz key fobs require a selected sort of battery. Utilizing the fallacious battery can harm the important thing fob or trigger it to malfunction. Seek advice from your automobile’s proprietor’s handbook for the right battery specs.
4. Eliminate Batteries Correctly
Used batteries must be disposed of correctly to forestall environmental contamination. Don’t throw them away within the trash; as an alternative, recycle them at a delegated battery disposal facility.
5. Maintain Batteries Away from Kids and Pets
Batteries may be harmful if ingested or ingested. Maintain them out of attain of youngsters and pets to forestall unintentional 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 turn 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 mandatory 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 test the vary and performance of the buttons.
10. Further Precautions for Sensible Key Fobs with Immobilizer
Sensible key fobs with immobilizer programs require extra precautions:
- Use the Emergency Key: If the good key fob battery is lifeless, you should utilize the emergency mechanical key to unlock and begin your automobile.
- Keep away from Robust Magnets: Robust magnets can intervene with the immobilizer system. Maintain your good key fob away from magnets, akin 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 good key fob in a separate location from the automobile when not in use.
Substitute Key Battery for Mercedes-Benz
Changing the battery in your Mercedes-Benz key fob is a straightforward activity that may be accomplished in only a few minutes. Listed here are the steps you might want 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.
Substitute the battery with a brand new one, ensuring that the constructive and adverse terminals are aligned appropriately.
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 sort of battery does my Mercedes-Benz key fob use?
Most Mercedes-Benz key fobs use a CR2025 battery.
How typically do I would like 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 exchange the battery in my Mercedes-Benz key fob myself?
Sure, you’ll be able to exchange 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 a couple of indicators that the battery in your Mercedes-Benz key fob is lifeless, together with:
- The important thing fob would not work if you press the buttons.
- The important thing fob works intermittently.
- The important thing fob’s vary is diminished.
- The important thing fob’s LED mild is dim or would not come on in any respect.
