first read the owners manual, im 99% sure its in there, along with the seat warmers answer, for some reason said manual is missing, set the clock using the buttons on the steering wheel and the display in the dash, navigate thru till u get to the settings menu, go up to time/date and enter the correct time/date. while time is displayed on the dash hit the reset button on the dash itself, and the dial clock in the dash will move to the time displayed. as for seat heaters, look on the dash just above the radio. there will be a cluster of buttons with the center button being the button for the flashers (red triangle) on either end of that group there will be pictures of seats and 3 led bars on each button. its an option, some E-320's have it some dont
Refer to Page 160 of the owner's manual available at the following link: http://www.mbusa.com/vcm/MB/DigitalAssets/pdfmb/ownersmanual/2005_e320_ e320cdi_e500_e55amg_e3205004matic_sedans.pdf
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