the splitter off the teleaid antenna is not installed into the car till the stock phone is installed.(it is part of the phone kit) The splitter goes under the pass seat. I would suggest to you if you are trying to add an aftermarket cell phone the best way to do it is to add a internal glass mount antenna as the splitter is not availiable seperately and will not switch without the factory phone.

Scott

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The Mercedes Specialists Since 1986