they probably charge your credit card some extra amount of money temporarily until they receive your steering wheel. then they refund it. if they dont receive your steering wheel, the temporary charge never goes away.

i think i could change it out for a different Mercedes wheel, a Kleeman wheel, or the Startech wheel pretty easily, at least thats what they do on the Benz... but i really had my eye on a MOMO. I had one in my Miata and it changes the whole car. im still researching -- ill be removing the steering wheel this weekend to explore and ill report back. i have found a hub adapter for an SLK, but the merchant doesnt know anything about whats involved in installing it. all he can do is order it and ship it.