Go to the front passenger footwell, take off the floor mats. Now you see
black plastic. Go to the front of the footwell (the plastic part that is
angled against the floor) and lift that piece up and out, you will see a
multipin connector connecter there. Disconnect both connectors.
Same place on the 300E. Only problem, the radio may not work after
unhooking the connectors. If this happens, I was told that the MB dealer
will reset the radio for free. Call to confirm this before unhooking the
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