I just bought one for Phil for about $225 and the necks have the metal insert at the neck. You can buy one at the dealer for $265 if you are in a big hurry, but I got mine delivered to my door the day after I ordered it. In my case the radiator neck had not failed (it was made in 2001 - I guess a replacement for the original on my 1994 E320 Wagon) but the (steel?) clamps that hold the plastic tanks to the sides were seriously corroded and at the lower passenger side corner coolant had started to weep past. The new radiator seems to have clamps made of the same aluminum as the radiator so that should not happen again. Note that if you also replace the upper and lower hoses and buy two gallons of Mercedes coolant the total bill will run to over $310.

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Chip Johnson