cl600 key fob battery change how many?

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hagarfriend

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1996 s280dIesel in Spain. 2003 CL 600. Now gone. 2004 CL600 v12 bi 2008S320L diesel. 2008 CL63 AMG
Hi to all,

I have been looking on the site for unstructions on how to change the battery in my key. All of the instrcutions mention batteries whereas my key only has one in it.
Is this correct??

Many thanks

Clint
 

drmw

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Not sure about your model, but if has keyless entry/go, then I understand they all have only one battery.
 

television

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Sorry all keys have 2 batteries as the run on 6 volt, this includes keyless go cards, but they can use the thinner 2016 batteries
 

drmw

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M6 Cab - prior to that, SL63 AMG, A-M V8 Vantage, SL55, SL500 and many more
Must disagree Malcolm - mine was playing up a few weeks ago - changed the battery in both keys - only one per

2032 from memory
 

television

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Then please read page 351 of the handbook 2 x 2025 to quote from the book, "you will need 2 3volt CR2025 round cell Panasonic or Varta cells"

I have had over 50 here for repair, I can recall that you had locking problems, this could explain it
 
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hagarfriend

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key battery

Hi Malcolm,

My key only has one battery a CR2025. I cannot physically get another battery in the key.
on the part of the key which holds the battery it says
5WK4 7291
433.92MHz

Any ideas

Thanks

Clint
 
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hagarfriend

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battery

So do i need 2 thinner batteries to make the key work properly as i have been having problems with the vehicle not recognising the key and only being able to lock and unlock from a short distance away?

Clint
 

drmw

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Your Mercedes
M6 Cab - prior to that, SL63 AMG, A-M V8 Vantage, SL55, SL500 and many more
Then please read page 351 of the handbook 2 x 2025 to quote from the book, "you will need 2 3volt CR2025 round cell Panasonic or Varta cells"

I have had over 50 here for repair, I can recall that you had locking problems, this could explain it

Malcolm - your knowledge of keys is not in dispute

On the other hand, I am not daft.

I parted with the car (therefore the handbook) yesterday morning.

The attached took some finding - note reference to the singular battery. There is not enough physical space to hold two and there is no other key in the fob
 

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television

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Hi Malcolm,

My key only has one battery a CR2025. I cannot physically get another battery in the key.
on the part of the key which holds the battery it says
5WK4 7291
433.92MHz

Any ideas

Thanks

Clint

Well I have never seen a key that only uses 1 battery, and as before I have repaired more than 50, the quote in my above post was from the SL230 handbook that applies to the 350,500 55 and 600
 

television

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Malcolm - your knowledge of keys is not in dispute

On the other hand, I am not daft.

I parted with the car (therefore the handbook) yesterday morning.

The attached took some finding - note reference to the singular battery. There is not enough physical space to hold two and there is no other key in the fob

All keys from 1998 till at least 2008 use 2 batteries I quoted from the 07-2003 handbook, this includes the plastic and chrome types, this is the handbook that came with your car, do I have to photocopy it, and I have been repairing them for 5 years. the only key that uses 1 x 6 volt is the one for the remote heater.
 
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hagarfriend

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key battery

Many thanks DRMW,
that picture is my key

Clint
 

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So do i need 2 thinner batteries to make the key work properly as i have been having problems with the vehicle not recognising the key and only being able to lock and unlock from a short distance away?

Clint

A 2003 SL 230 requires 2 x CR2025 batteries, I have never in my life seen one that uses one, they are only 3 volt and the range would be terrible
 

grober

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http://www.mbusa.com/vcm/MB/DigitalAssets/pdfmb/ownersmanual/2003_cl500_cl600_cl55amg.pdf page 299/300 quotes 2 X 2025.
Remember the manual will be a translation from German. As Malcolm says 2 3volt batteries in series will yield 6 volts= correct operating voltage-------- however I guess its possible there's a design margin of error to account for diminishing battery voltage in the design. Chances are the unit may function with one- very good single battery ---- consequence would be reduced range and possible endurance???
 

busby20

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Malcolm - your knowledge of keys is not in dispute

On the other hand, I am not daft.

I parted with the car (therefore the handbook) yesterday morning.

The attached took some finding - note reference to the singular battery. There is not enough physical space to hold two and there is no other key in the fob

It does say "Batteries" plural in the narrative?
 

television

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See post #16

Lets leave that on out for the time being as the first chrome key had a very short life and it was soon replaced with one that used 2, and I have only ever seen 1 of those years ago
 
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