[Marcianello]

I have a 2009 C300 I’m selling with a single worn key fob. I ordered a newer fob on eBay but the internals are different. Mine has a round red panic button, the new one has a red triangle.

I can’t swap the chip like I thought I could, so I’m wondering if I can code the triangle key to my car since the hard key fits in it perfectly. Does anyone know what the difference is between the two styles?

 

[khomer2]

You've posted on the General forum.

Please Complete your Profile by adding the year and model of your car, so it will show next to every future post under your avatar.
Members are not likely to search for the one post the model of the car is mentioned.

 

[Marcianello]

You've posted on the General forum.

Please Complete your Profile by adding the year and model of your car, so it will show next to every future post under your avatar.
Members are not likely to search for the one post the model of the car is mentioned.

Thanks, I fixed it. I added the C-class but I’m not keeping it.

 

[Deplore]

No, key is completely different. You can't swap. Internals different.

Sell the car and be done with it.

 

[Marcianello]

Can a key be programmed to any model or are they model specific?

I’ve seen so many models with the same fob, it looks like you can use almost any of them.

 

[Deplore]

Only specific ones can be reprogrammed, and you need specialty tools and tons of experience.

Not something an average joe can do in 1 hour with youtube guides.

 

[Marcianello]

Only specific ones can be reprogrammed…

What do you mean by that? Every Mercedes key must be programmed or it won’t work. Nobody reprograms a key fob, they just code it to the ignition module.

 

[Deplore]

You are mixing words. I was very clear on what I said....I meant exactly what I said.

Only specific keys can be REPROGRAMMED.

Point is, you're not going to be able to do it unless you have a few grand lying around to purchase the tools necessary to do this.

 

[93SoCal400E]

pix would help