I went through the same thing when I bought my 2002 E320 SW....*sigh*
It will depend whether your car is wired for a Timeport or Startac phone. Take it to a dealer & let them look at the bracket in the armrest - they can tell what model it will take. A replacement phone from them - if available is a rip-off so get one from a reputable seller on Ebay. It MUST be a Mercedes Benz badged phone (they have the chip which allows it to work with the integrated system). Just be sure the service provider on the phone (Sprint, Verizon, etc) is available in your area. Get the HEX or DEC# from the phone & call the service provider to be certain they can activate it BEFORE you buy it. Also, if you are in the USA and currently have a cell phone, you can have your phone # ported to the new phone.
Do you have the voice module? (a stalk on the right side of the steering column)
It will depend whether your car is wired for a Timeport or Startac phone. Take it to a dealer & let them look at the bracket in the armrest - they can tell what model it will take. A replacement phone from them - if available is a rip-off so get one from a reputable seller on Ebay. It MUST be a Mercedes Benz badged phone (they have the chip which allows it to work with the integrated system). Just be sure the service provider on the phone (Sprint, Verizon, etc) is available in your area. Get the HEX or DEC# from the phone & call the service provider to be certain they can activate it BEFORE you buy it. Also, if you are in the USA and currently have a cell phone, you can have your phone # ported to the new phone.
Do you have the voice module? (a stalk on the right side of the steering column)