MB branded Motorola phones ARE just very expensive. Nothing you can do about it.
Having a pre-wired car means, that you can add a phone kit quite easily, BUT you do need the PSE, additional wiring etc. to make it work. Which will cost some money either way.
Here is a link with phone kit info - you will see that you can get either UHI (which is compatible with various GSM phones) or MHI kits (which are compatible with MB branded Motorola phones) for your car:
http://www.mbenznl.com/products/phones/
greetingz,
BigSis
Having a pre-wired car means, that you can add a phone kit quite easily, BUT you do need the PSE, additional wiring etc. to make it work. Which will cost some money either way.
Here is a link with phone kit info - you will see that you can get either UHI (which is compatible with various GSM phones) or MHI kits (which are compatible with MB branded Motorola phones) for your car:
http://www.mbenznl.com/products/phones/
greetingz,
BigSis