I have a question.

Last year, I ordered a Skeem, key, and antenna ring from Needwings.

My Mercedes guy said I needed the antenna ring but I ordered the entire setup. They replaced the antenna and the old key starts the car but the new key does not.

Does anyone have any ideas what the issue is? Should I put the new skeem in as well?

The old key is the only one I have and it's in bad shape.

Thanks for the help.