I don't think you need to move either out of the way.
I searched some threads for you, and it seems that buying a certain snap-on tool would be worth it.
Here is the best thread I found for replacing a water pump:
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".