My battery on my 2000 ml key ran out. I took the key apart. The battery type or number is not listed on the old battery.

Don't want to go to the dealer. They are big $$$$. Can any help by providing me with the battery number like CR2016 ect and the voltage. Thanks.

And would any know if they are the same for the 2003 G500s

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Silver Honda Accord, 2006
Silver G500, 2003
Silver SLK-320, 2002
Black ML-320, 2000
Bule Porsche 993 Targa , 1997
Silver Merkur XR4Ti, 1987

I called mercedes costomer service. they said for both my ML and G500 the battery to use on the keys are "CR 2025".

Just incase you folks want to know.

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Silver Honda Accord, 2006
Silver G500, 2003
Silver SLK-320, 2002
Black ML-320, 2000
Bule Porsche 993 Targa , 1997
Silver Merkur XR4Ti, 1987

The battery is available at Wal-Mart in the coin sized batteries in the battery section. I don't remember the number but its the only one they sell that is the same diameter and thickness. We replace the battery in both keys at least once a year for good measure. The procedure to synchronize it with your AAM is in the manual - one caveat - your driver door MUST be CLOSED when you do the procedure or the code doesn't take. I found this out the hard way after fooling with it for 30 minutes.

If you do it quickly you wont have to re-sync