08 CLK arm console "I" and "wrench" buttons
-JS

or this:

Then you don't have the phone option, and yes, it will cost you over $700 to add it. You may have "phone pre-wiring" which simply means you have an $10 wiring harness in the console and that's it. You still need a lot of extra parts to get a cell phone integrated. Yes, it's crazy, but this is the same company who was still installing cassette players an not standard CD players in their cars in 2004.
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