what should i do?

[dmon]

about a month ago i bought a transmission for my 300sdl. i bought it from one mercedes place and had it put in at another (the place where i bought the transmission was not able to put it in). anyway it started leaking fluid so i took it back to the second place that put it in. This was Tues. now it's Friday i'm finding wet spots AGAIN under the car beneath the transmission. should i pay to have it resealed at another Benz shop or let them keep doing it until they get it right? if i go to another Benz place i know it's going to cost.