Most services are located on the N-630, which runs parallel to the camino two streets to the west (your left).
If you made your way to the N-630 while in Torremejía there is no need to retrace your steps. Follow it out of town and you will rejoin the camino which emerges from your right. If follows adjacent to the road before arrows and a bollard direct you towards a path on your right. It passes the Ence Mérida factory and heads straight to the outskirts of Mérida where the arrows are a bit unclear. When you emerge onto the road you will see ahead of you a bridge over the river; you need to follow the trail (not the road) which passes underneath that bridge. It leads directly to a small riverside park and at the end of the park is the pedestrian bridge over the río into Mérida.