You need two (2) of the 2025 batteries https://amzn.to/3TDJ1T5

Here is a quick little video on how to change the dead / weak 2025 batteries in your Mercedes Benz key fob. For this style of fob, you will need to slide the tray out as I've shown. Replace the two dead 2025 coin cell batteries with your fresh batteries and slide the tray back in place. After that, you're all set and back in action!

for Mercedes C Class (20012007)
for Mercedes E Class (19982009)
for Mercedes CLS/Mercedes CLK (20012009)
for Mercedes ML/Mercedes B CLass (20052010)
for Mercedes SLK/Mercedes CL(20052010)
for Mercedes S Class (19992006)

1998 1999 2000 2002 2003 2004 2005
MERCEDESBENZ C230
2001 2002 2003 2004 2005
MERCEDESBENZ C240
2006 2007
MERCEDESBENZ C280
2002 2003 2004
MERCEDESBENZ C32 AMG
2001 2002 2003 2004 2005
MERCEDESBENZ C320
2006 2007
MERCEDESBENZ C350
2005 2006
MERCEDESBENZ C55 AMG
2000 2001 2002 2003 2004 2005 2006
MERCEDESBENZ CL500
2001 2002 2003 2004 2005 2006
MERCEDESBENZ CL55 AMG
2001 2002 2003 2004 2005 2006
MERCEDESBENZ CL600
2005 2006
MERCEDESBENZ CL65 AMG
2003 2004 2005
MERCEDESBENZ CLK320
2006
MERCEDESBENZ CLK350
2003
MERCEDESBENZ CLK430
2003 2004 2005 2006
MERCEDESBENZ CLK500
2003 2004 2005 2006
MERCEDESBENZ CLK55 AMG
2005 2006
MERCEDESBENZ CLS500

FCC ID: IYZ3312
CANADA: 27011032302
315 MHz
MANUFACTURER P/N: 20490562029999, 20490511049999