Well, my wife handled this so I'll have to ask her.

I would have done it myself but:
1) local dealer, Dick Dyer Mercedes, sells it for $148.50. Their parts prices are usually outrageous so I buy as little as possible from them. In light of the local dealer's price, $226 sounds reasonable.

2) would have gone on line to get it but timing is not good. I'm working 12 hour days, we have a young child, we're traveling this weekend, blah, blah, blah.

3) I just tried to check online prices for the heck of it. Fastlane and *************** are out of stock. Two other sites say call them so I suspect they are out as well.