Mercedes C300 (W204) SmartKey Battery Replacement (Smart Key)

This video shows how you can replace the batteries in your Mercedes C300 SmartKey. This SmartKey / key remote uses two 3V CR2025 batteries. Please check the type of a battery that your SmartyKey uses. The batteries that were in my key were made by Panasonic. I replaced them with the same CR2025 type made by Energizer. You can also use other major brands such as Duracell.
Note: There are a few variations of Mercedes SmartKeys and the methods you use to replace the batteries. This video shows the SmartKey where the batteries plastic carrier slides out from the back of the key. Make sure your key uses the same design before using this method.
Keywords: Smart Key, SmartKey, Keyfob, Battery Replacement, C300 Mercedes 2008

[@Juan-bl4yj]

It’s been years since I’ve had my 2009 Mercedes C300 car key without a battery because I could never figure out how to get to the batteries! I was afraid of breaking it so I never went beyond the usual troubleshooting. Thank you so much ! I now discovered that I even have an alarm to go with my car !!

[@ihaia829]

Thank you very much! Only tutorial that showed how to do this!!

[@swansmeister]

I knew it would have been the way, tried some things with the key but was scared to break it but got it now, thx a lot man!

[@themiln]

Finally someone who knows what they are talking about

[@melzariodesign]

I dont see how you got thumbs down on this. Awesome clip!

[@TheFito33]

Maybe mercedes benz dealers

[@ricardofogel671]

Thank you! I knew somebody had the correct way of removing this key style of battery without damaging the internal plastic.

[@SimmyMann]

Super helpful. Thank you!

[@TheVEUTE]

Thank you. Well explained for my 2008 R171. Thank you, thank you, thank you.

[@tebatsomabusela4197]

Thank you so much. This was so helpful.

[@TheGuidedIntuitive]

Thank you! Worked!

[@kizitohenry8037]

This was very helpful. Thanks

[@glenkelly998]

Very clear and simple 👌

[@1americanrecon]

I was here to change the batteries. 👍🏻

[@tehletkhan3511]

Brilliant, Thank you.

[@ROBWDS]

The perfect learning tool, thank you. I keep forgetting that over a period of time, always using the keyless entry, eventually the batteries will run out.

[@neery794]

Awesome, thank you

[@eagledeoro]

Thank you very much for the tip.

[@nonamesl3f7duuude]

Thank you!

[@Swazetta]

Very helpful

[@gppowis]

400th thumbs up like. Well deserved. Thank you. Shame my replacement batteries are also flat! :/ doh.

[@Dannzt]

Thank you :)

[@mr.kplays7526]

You solved a headache!!!

[@bpetertube]

Wonderful. I am glad this helped.

[@amitev]

Thank you very much for sharing!

[@bpetertube]

You are welcome!

[@tori2427]

Thank you!!

[@ahyahy2019]

Thank you

[@attilapolyak9112]

Thank you😎👍🏻

[@Iaarushkhurana]

Thank you so much

[@MrWonkawonka]

Thank you.

[@harri126]

Thanks

[@acejojo]

Thanks 🙏🏾

[@bpetertube]

You are welcome

[@coolk8396]

does anyone know how to reprogram the c309 key? please help!!!

[@Jatildy72]

Is the cr2032 the wrong battery

[@aldonhodges6188]

this DOES NOT WORK on a C 300 2009 model. Now my key fob is screwed up. That should have been your first line is the description. Will not work on C 300 2009 models. not your last.

[@bpetertube]

At 8 seconds into the video it states that this is for a model year 2008. Can you share what you find out was different for model year 2009 so your info can help others?

[@kpkalsi]

Thank you