Originally Posted by
RyanB
Fairly certain it is 2 ohms. I saw it mentioned in several places on the SLK forums. This thread specifically states dual voice coils as well (a couple of different times).
Moron's guide to aftermarket head unit installation - MBWorld.org Forums
"Since the stock sub is dual voice coil I have run both coils in parallel bridged at 2ohm which the amp is compatible with."
I don't think the speaker in that eBay ad is dual coil. I only see 1 pair of wires.