How do I merge two quads that overlap each other into one? I am relatively new to Blender and since I couldn't find any answer elsewhere online I decided to ask here for some support.

How do I merge two faces into one? What I am trying to do is merge the left and right quads along the center together because they overlap and create two pieces that extrude instead of one (which is what I am trying to do)...



I tried Bridge-Edge Loop but it doesn't create the desired effect, as you can see here:



Thank you in advance!
Aldin
If you have overlapping faces like this:



You can select the edges to be merged:

 

Then scale them to 0 on the X axis SX0



and then press the space bar and type "remove doubles"