Since I have the same engine as you, I can tell you that Fastlane sells the throttle actuator for $961 U.S. dollars.
The dealers charge several hundred dollars more.
Do the math at the current exchange rate, and I'll bet it'd be cheaper buying off of this site and having Phil FedEx it to you.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".