Correct lamp replacement

[dbgrate]

Looking at the Osram Sylvania lamp replacement guide,I see there are two choices for the 2002 Benz E Class headlamps. One is halogen capsule----the other is with HID. Without removing the present headlamp on my 2003 Wagon (same as 2002),how can one determine which lamp type to get as a replacement...how can I tell what kind I already have?? Thanks for any help!!