Key Remote
Thread Starter
Newbie
Joined: Dec 2005
Posts: 23
Likes: 0
From: Tempe, AZ
1998 E320
Key Remote
Need some help... I need to change the battery on my remote. how do you take it apart and does any one know what type of battery I need to buy. Will I have to reset the remote?
thanks,
thanks,
Super Member
Joined: Dec 2004
Posts: 620
Likes: 1
From: TX
13 Lunar Blue GL550, 06 Imola Red BMW X5 4.8is, 04 Gold Honda Ody
Battery is a CR 2025. (two needed)
Don't buy the battery from the dealer, they sell two for $10+. I bought 20 for the same price.
It's easy to change, you need to remove the valet key (silver key), and then you will see a small button to press (use the valet key to press it in). Then slide it open.
Don't buy the battery from the dealer, they sell two for $10+. I bought 20 for the same price.
It's easy to change, you need to remove the valet key (silver key), and then you will see a small button to press (use the valet key to press it in). Then slide it open.
Super Member
Joined: Jul 2003
Posts: 693
Likes: 1
From: Mansfield, TX
11 ML350W2 / 17 GLC300
The metal valet key is only used to lock/unlock the glove box, trunk, the driver's door if the remote won't work and to open the remote key. The batteries are only needed for the remote. The key without batteries will work fine to start the car.
Thread Starter
Newbie
Joined: Dec 2005
Posts: 23
Likes: 0
From: Tempe, AZ
1998 E320
Thanks for the help....I figured the battery was going dead but I'm still having the same issue. I have to get really close to the door to arm the car. I even tried to use my spare and it's doing the same thing. 
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Newbie
Joined: Sep 2006
Posts: 4
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'01 S500
FYI -- I bought 2 Duracell DL2025 batteries to replace the VARTA (what I assume were the originals) Unfortunately they do not work, so I need to go find some other ones that may work. I figured the DL was simply a Duracell product id for their version of the 2025, but clearly there's something different about these batteries.
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Member
Joined: Sep 2005
Posts: 177
Likes: 0
From: Princeton NJ
2015 E350 4matic Sport and 2011 C300 4matic sport
Also don't forget to try the trick I leaned on this board. Hold the smart key up to your throat under your chin, open your mouth and press the key, the key will work from much farther away then normally. Of course you look like a dumb *** walking toward your car with your mouth open and the key stuck to your throat, but it does work!!!
Newbie
Joined: Mar 2006
Posts: 3
Likes: 0
From: Little Rock, AR
2001 E320-Classic Alabaster White
U-R Pulling my Leg!
Also don't forget to try the trick I leaned on this board. Hold the smart key up to your throat under your chin, open your mouth and press the key, the key will work from much farther away then normally. Of course you look like a dumb *** walking toward your car with your mouth open and the key stuck to your throat, but it does work!!!
MBWorld Fanatic!
Joined: Jan 2004
Posts: 5,939
Likes: 178
From: Seattle WA
99 E320
opening the mouth has no advantages. simply touch the business end to your
chin suffices. since the locking system is RF your bone/head acts as a ground
plane/radiator for the transmitter. for those with metal key inside slid into the
Smartkey, you actually get another half doz paces distances with the key
extended and touching your jaw. i recall getting another 50' when used with
a 1/4 wave VHF/UHF antenna when i was experimenting last year. but for
weak batteries, better not to goof around and just get new cells.
chin suffices. since the locking system is RF your bone/head acts as a ground
plane/radiator for the transmitter. for those with metal key inside slid into the
Smartkey, you actually get another half doz paces distances with the key
extended and touching your jaw. i recall getting another 50' when used with
a 1/4 wave VHF/UHF antenna when i was experimenting last year. but for
weak batteries, better not to goof around and just get new cells.
Member
Joined: Sep 2005
Posts: 177
Likes: 0
From: Princeton NJ
2015 E350 4matic Sport and 2011 C300 4matic sport
Raymond is right, you do not have to have your mouth open, but as a trick with the kids it l works better with your mouth open...But it definitly works!
Member
Joined: Mar 2004
Posts: 132
Likes: 2
From: Dallas, TX
2007 Mercedes SL550 Sport
battery replacement for 98 & newer remote (smart key)
I know the pre 98 E class uses the 2025 battery, but what about the 98and newer with infrared remote? it's been working very radically specially locking the car on my 2000 E320. how do you change the battery and do I need to have it reporgrammed after replacing the battery? thanks
MBWorld Fanatic!
Joined: Jan 2004
Posts: 5,939
Likes: 178
From: Seattle WA
99 E320
Member
Joined: Mar 2004
Posts: 132
Likes: 2
From: Dallas, TX
2007 Mercedes SL550 Sport
got it. pull the metal key out, then insert it on the very top (90 degrees). now you can easily pull the top of the key out (like a drawer), exposing the 2 CR2025 batteris. buy any brand and replace.
that's all I was asking. of course if I had access to the manual I would not posted the question on this forum looking for help.
that's all I was asking. of course if I had access to the manual I would not posted the question on this forum looking for help.
MBWorld Fanatic!
Joined: Jan 2004
Posts: 5,939
Likes: 178
From: Seattle WA
99 E320
i actually considered buying a printed edition off Ebay and scanning it to PDF
just to have. much easier to sort through that than the paper copy.
so......if anyone has PDF edition of 97, 98 or 99 E320/420/ out there, it
would be great if you can let me know.
just to have. much easier to sort through that than the paper copy.
so......if anyone has PDF edition of 97, 98 or 99 E320/420/ out there, it
would be great if you can let me know.
Member
Joined: Nov 2006
Posts: 229
Likes: 0
From: Charlotte, N.C.
06 CLS500, 04 Tahoe, 04 Infiniti G35 Sedan, Boeing 737
Considering this head and throat thing maybe this might work too because mine is working only part time also. Heres the question? 
If I hold my keyfob up to my rearend, not my cars rearend but my buttocks, my cheeks, the seat of my pants, pointing it in the general direction of the vehicle, upwind of course, and let one rip will the hot gases blown in the direction of the car help carry the radio frequency further?
OK, I know that your thinking, what in the world would standing upwind have anything to do with it? Hey, I am not a scientist, but I did stay at a Holiday Inn last night.
Jeff
If I hold my keyfob up to my rearend, not my cars rearend but my buttocks, my cheeks, the seat of my pants, pointing it in the general direction of the vehicle, upwind of course, and let one rip will the hot gases blown in the direction of the car help carry the radio frequency further?
OK, I know that your thinking, what in the world would standing upwind have anything to do with it? Hey, I am not a scientist, but I did stay at a Holiday Inn last night.
Jeff
Member
Joined: Sep 2005
Posts: 177
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From: Princeton NJ
2015 E350 4matic Sport and 2011 C300 4matic sport
Don't know about the hot gasses, but if you add a 12 volt battery to the key, then stick it in your ***, you will get a hard on and not worry about un-locking the door.
A year and a half since the last post and this is what you have to contribute ?!
Member
Joined: Mar 2004
Posts: 168
Likes: 1
From: Work
2016 Z06/Z07, 2017 AMG GT
Also don't forget to try the trick I leaned on this board. Hold the smart key up to your throat under your chin, open your mouth and press the key, the key will work from much farther away then normally. Of course you look like a dumb *** walking toward your car with your mouth open and the key stuck to your throat, but it does work!!!
Member
Joined: Sep 2006
Posts: 237
Likes: 0
From: Los Angeles, CA
G63 W463
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hope this helps!
hope this helps!
