Yes, shortly after I replaced my water pump because of leaking, the heater hose at the back of the engine developed a leak.
If you replace the water pump, replace the bearing bracket that the belt loops around. If not, it'll go out, too, soon afterward.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".