Warning Message CLS500 2006

Hi, I want to buy a MB for the first time, I have this messages in the dash. Is somebody knows what it means? And how much it costs to fix it? Thank you for your help.

Hi,
I want to buy a MB for the first time, I have this messages in the dash. Is somebody knows what it means? And how much it costs to fix it?

Thank you for your help.

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