How to connect my iPhone to 2008 Mercedes

You may not be able to connect a modern iPhone to a car from 2008. Do you know if the car has the ability to connect via Bluetooth? Your best bet would be to contact your Mercedes dealer for guidance.

Ps: a quick google search found that Mercedes didn't start adding Bluetooth to cars until 2007 (likely 2008 models) and that did not include all models. And it didn't work reliably well until sometime after the 2009 models were released.

Finally, you may find an aftermarket audio seller, who specializes in car infotainment systems who may offer some form of aftermarket kit which they "might" possibly be able to make work with such an old car.

You have already contacted Mercedes Benz and they told you to call Apple, correct?

Honestly, the chances that someone who has done this and knows how to do this who might also see your post here are extremely low, but it is always true that you never know in situations like this.

Since posts only remain "live" for a few days, if you have not received an answer within the next 3-4 days, chances are you won't ever receive an answer. So, try posting the same question in another week or so, and another week after that, etc.

Fingers crossed.