You're probably standing by your car at this time questioning why the doors won't unlock, which means it's definitely time for a key fob battery replacement mercedes benz owners often put away until the last following. It's one of those minor irritations that feels such as a huge deal whenever you're in a rush, but the great news is that it's an incredibly easy fix you can handle within about two a few minutes with no special mechanical skills. You don't have to drive to the dealership plus pay their insane markups just for the simple battery exchange.
How to tell your battery is actually dying
Most Mercedes-Benz models are pretty smart about suggesting when something is wrong. You'll usually get a message pop up on your own instrument bunch that says "Replace Key Battery. " If you see that, take it significantly! Don't wait 3 weeks like I usually do.
If your car is a bit older and doesn't give you a digital warning, you'll start realizing the range dropping. You might find yourself having to stand correct next to the driver's side doorway or clicking the particular button four or five times just before the lights lastly flash. Another free items is the tiny red LED lighting within the fob alone. If you press the button and that will light is poor or doesn't blink at all, your own battery is on its last hip and legs.
Choosing the particular right battery
Before you begin popping the situation open, you need to make sure you possess the right components. Almost every Mercedes key fob from the last twenty yrs uses a CR2025 3V lithium battery. A few older versions or specific specialized keys might get a CR2032, yet 90% of the time, it's the 2025.
Here's just a little tip: don't buy the least expensive generic batteries a person find at the particular checkout counter of a grocery store. I've tried those, and they usually die in about six months. Spend the extra number of dollars on a brand name like Panasonic, Sony, or Duracell. Mercedes actually uses Panasonic from the manufacturer, plus they tend to last a great 2 to three many years. Also, since they usually come in packs of two, simply throw the spare in your kitchen drawer. You'll appreciate yourself later.
Replacing the battery in the "Chrome" key
This is usually probably the almost all common key design around right today. It's one along with the silver stainless- accents on the sides.
- Pull the emergency key out: On the bottom from the fob, there's a small moving tab. Pull that back with your thumbnail and pull out the silver mechanical key blade.
- Pop the back cover: Take that same metallic key blade you just pulled out and look at the slot it emerged from. You'll get a little notch or a different colored tab inside. Push the final of the key blade against that tab while at the same time pulling or pushing within the back cover from the fob. The particular back panel need to pop quickly.
- Swap the particular batteries: On this model, you'll usually see one or 2 CR2025 batteries. Pay attention to which usually way the "+" sign is dealing with! Usually, it faces up toward you. Slide the aged ones out and slide the new ones in.
- Snap it in return collectively: Put the cover back on, click it into place, and slide your metal key back within.
The newer "Sleek" key style
If you have a newer Mercedes (roughly 2017 or more, like the newer E-Class or S-Class), your key looks much leaner and more contemporary. The key fob battery replacement mercedes benz procedure for these is usually slightly different but arguably even simpler.
- Strike the release button: There is a button on the back of the particular fob. Press it, and the back cover up will slide down or pop up slightly.
- Remove the battery tray: Once the cover is off, you'll visit a little holder quietly. You may usually pull this particular out together with your fingernail.
- Replace the CR2032 or CR2025: These newer fobs often make use of a single battery. Just pop the old one out, put the new one within (again, check that will polarity! ), and slide the holder back in.
- Test that out: Give this a click. When the car chirps, you're golden.
Dealing with the old-school black plastic keys
When you're driving the classic from the earlier 2000s, your key is likely most black plastic. These are a bit even more "fiddly. " A person have to slide the gray tab at the very top, pull out there the emergency key, and then make use of the key blade in order to "pry" the inner housing out associated with the shell. It feels like you're pulling the guts out of the remote. Once the particular internal part will be out, the electric batteries sit in a small cradle. You need to be soft with these; your invisalign aligner can get frail through the years.
What if it nevertheless doesn't work?
So, you've done your key fob battery replacement mercedes benz and nothing. The car is still sitting there noiseless. Don't panic however.
First, examine the battery orientation. It is incredibly easy to flip the particular battery upside lower by mistake. The flat side with the writing ought to more often than not be facing "up" so you can read it once it's installed.
Following, check the metal contact tabs within the fob. Occasionally they get somewhat bent or protected in a little bit of dust. A person can gently—and We mean gently —bend them up a tiny bit with a toothpick to create sure they're creating a solid connection with the battery.
If the fob lamps up but the vehicle won't start, it might have dropped its "sync. " This really is rare with newer models, yet on older types, you might need to stick the key straight into the ignition (if your car still has an actual slot) and turn it towards the "on" position without beginning the engine. Allow it sit for any minute so the particular car can acknowledge the key's transmission again.
The reason why you should avoid the dealership for this
Look, I love Mercedes service departments for that free coffee and the loaner cars, but having to pay them $40 or even $50 to get a battery change is simply ridiculous. You can buy a two-pack associated with batteries for regarding $5 online. The dealership is going to cost you for the "labor" of the technician walking to the parts counter-top and clicking an item of plastic into place. Save that money for your next oil change or a nice vehicle wash.
Keeping your key fob healthy
Whilst we're talking about servicing, try to maintain your key fob away from your cell mobile phone in your pocket if you can. It noises like an old wives' tale, but the particular signals can occasionally conflict with each other and drain the particular fob battery quicker. Also, if a person have Keyless-Go (the feature where a person just touch the door handle to unlock), your fob is constantly "talking" to the car. This means the battery will die quicker than a traditional "click-to-unlock" remote.
If you have a spare key which you in no way use, it's actually a good concept to remove the battery from it if you plan on storing this for years. Batteries will often leak more than time, plus a leaked battery can ruin the expensive circuitry inside the fob.
Covering things up
Performing a key fob battery replacement mercedes benz is really a small victory in the world of car ownership. It's one of the few issues on the high-end German born car that doesn't need a specialized computer or perhaps a degree within engineering.
Next time you discover that "battery low" warning on the splash, don't sweat it. Just grab a CR2025, spend two minutes with your key blade, and you'll be back on the road without any trouble. It's a basic DIY fix that keeps your Mercedes experience as soft as it should be. Safe driving!