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 be concerned, changing the battery in a Mercedes-Benz secret is a comparatively easy course of that may be performed in only a few minutes.
First, you may want to assemble a number of instruments. You may want a small screwdriver, a brand new battery, and a clear fabric. After you have 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 performed 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 Use the screwdriver to fastidiously take away the outdated battery and substitute it with the brand new one. Be sure to insert the brand new battery within the right 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 verify it is working correctly. Press the buttons on the fob and guarantee that the lights flash and the automotive responds. If the important thing fob isn’t working correctly, examine to guarantee 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 situated 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 often 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, steel, or leather-based.
After you have recognized the important thing fob, you will want to find the important thing launch button. This button is often situated 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 often situated 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 |
|---|---|
| Customary Key | Screwed-on cowl |
| Good 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 instrument.
As soon as the quilt is eliminated, it is possible for you to to entry the important thing battery. The battery is often held in place by a small spring or clip.
Gathering the Essential Instruments
To efficiently substitute the important thing battery on your Mercedes-Benz, you will want sure important instruments. Before everything, guarantee you will have 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 advisable, because it supplies 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 instrument. This instrument helps to take away the mechanical key from the important thing fob to achieve entry to the battery compartment. It’s a specialised instrument that’s particularly designed for Mercedes-Benz key fobs.
| Instrument | Objective |
|---|---|
| CR2025 Battery | Alternative 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 often flush with the floor and will have an emblem 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: Fastidiously Separate the Halves
As soon as you’ve got efficiently slid the casing open, be additional cautious when separating the 2 halves. Delicate inside parts and comes could also be current, so deal with them with care to keep away from injury.
|
Key Kind |
Battery Kind |
Battery Orientation |
|---|---|---|
|
Flip Key |
CR2032 |
Optimistic aspect (+) |
|
Good Key |
CR2025 |
Adverse aspect (-) |
|
Keyless Comfort System (KCS) |
CR2016 |
Optimistic aspect (+) |
Eradicating the Previous Battery
After you have situated the important thing battery, you have to take away the outdated battery. This is how one can do it:
-
Pry open the important thing fob. You need to use a small flathead screwdriver or a key to pry open the important thing fob. Watch out to not injury the fob.
-
Find the battery. The battery is often situated 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 an excellent reference to the brand new battery.
Battery Alternative Desk
| Mercedes-Benz Key Mannequin | Battery Kind |
|---|---|
| Good 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 detrimental 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, fastidiously press the optimistic terminal into place, and safe the battery with the retaining clip.
- Take note of the polarity:** Make it possible for the optimistic terminal on the battery matches the optimistic terminal within the battery compartment. Incorrect polarity can injury your automotive’s electrical system.
– Double-check the match:** Earlier than securing the battery, double-check that it suits snugly within the compartment and would not transfer whenever you press on it.
– Tighten the retaining clip:** Fastidiously tighten the retaining clip to safe the battery in place. Overtightening can injury the clip or the battery, so use warning.
Reassembling the Key Casing
Step 6: Reattach the Key Blade (Elective)
In case you 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. Chances are you’ll 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: Exchange the Battery Cowl
After you have confirmed the bottom line 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 secret is 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 interchange it.
If the automotive doesn’t reply, attempt urgent the button a number of instances. If the automotive nonetheless doesn’t reply, the battery could also be fully lifeless and you will want to interchange it.
Extra Ideas
Listed here are some further ideas for testing the important thing performance:
- You probably have a spare key, attempt 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 extremely near the automotive, the battery could also be weak and ought to be changed.
- You probably have a keyless entry system, attempt 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 ought 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 instrument to softly pry open the important thing fob.
As soon as the important thing fob is open, establish the battery. It’s often 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 right sort 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 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 must be reprogrammed. This course of may be carried out by a Mercedes-Benz dealership or a certified 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.
- Await 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 look forward to 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 start out 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 obligatory to interchange the important thing fob or the ignition change.
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 often situated 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 Alternative 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 optimistic aspect (+) dealing with up.
- Shut the battery compartment and reassemble the important thing fob.
Troubleshooting Battery Alternative Points
Battery Nonetheless Not Working After Alternative
If the important thing nonetheless would not work after changing the battery, attempt the next:
- Be sure 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 parts 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 isn’t opening or closing the automotive, attempt the next:
- Be sure 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.
- You probably have a spare key, attempt 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 rapidly, attempt the next:
- Be sure the important thing fob isn’t getting used excessively.
- Verify for any unfastened or worn parts in the important thing fob.
- Attempt changing the battery with a brand new one.
- If the battery nonetheless drains rapidly, you might must have the important thing fob identified by a mechanic.
Extra Security Precautions
1. Keep away from Contact with Battery Acid
The battery acid in Mercedes-Benz key fobs is very corrosive and might 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 Quick Circuit the Battery
Quick-circuiting the battery could cause it to overheat and explode. Don’t contact the optimistic and detrimental terminals of the battery with steel objects, similar to instruments or jewellery.
3. Use the Appropriate Battery
Mercedes-Benz key fobs require a selected sort of battery. Utilizing the incorrect battery can injury 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 ought to be disposed of correctly to stop environmental contamination. Don’t throw them away within the trash; as an alternative, recycle them at a chosen battery disposal facility.
5. Hold Batteries Away from Kids and Pets
Batteries may be harmful if ingested or ingested. Hold them out of attain of youngsters and pets to stop unintentional harm.
6. Do Not Retailer Batteries in Excessive Temperatures
Excessive warmth or chilly can injury 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 injury or put on. If there are any cracks, damaged buttons, or different issues, it could be obligatory to interchange 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 verify it’s working correctly. Lock and unlock your automobile, and examine the vary and performance of the buttons.
10. Extra Precautions for Good Key Fobs with Immobilizer
Good key fobs with immobilizer techniques require further precautions:
- Use the Emergency Key: If the sensible 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. Hold your sensible key fob away from magnets, similar to these utilized in laptop computer instances 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.
Exchange Key Battery for Mercedes-Benz
Changing the battery in your Mercedes-Benz key fob is a straightforward process that may be accomplished in only a few minutes. Listed here are the steps you have to observe:
1.
Find the small screw on the again of the important thing fob and use a screwdriver to take away it.
2.
Fastidiously 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.
Exchange the battery with a brand new one, ensuring that the optimistic and detrimental 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 verify it’s working correctly.
Individuals Additionally Ask
What sort of battery does my Mercedes-Benz key fob use?
Most Mercedes-Benz key fobs use a CR2025 battery.
How usually do I would like to interchange 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’ll be able to 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 a number of indicators that the battery in your Mercedes-Benz key fob is lifeless, together with:
- The important thing fob would not work whenever you press the buttons.
- The important thing fob works intermittently.
- The important thing fob’s vary is lowered.
- The important thing fob’s LED mild is dim or would not come on in any respect.
