This is the right one!

INTRO
E |-3-3-1--3-3--6-3-------| 3X 
B |-4-4-2--4-4--7-4-------|
G |-5-5-3--5-5--8-5-------|
D |-----------------------|
A |-----------------------|
E |-----------------------|

E |-3-3-1-3-------------------------|  
B |-4-4-2-4----4-6-6b*---6-4-6-4----|
G |-5-5-3-5--5-------------------5--|
D |---------------------------------|
A |---------------------------------|
E |---------------------------------|

*little bend here

Mexicali baby, you know I love you so
Don't you know I can't let you go
E |----------------------|  
B |-4-4-4-4-4-4-4-4-4-4-4|
G |-5-5-5-5-5-5-5-5-5-5-5|
D |-5-5-5-5-5-5-5-5-5-5-5|
A |-3-3-3-3-3-3-3-3-3-3-3|
E |----------------------|

I need you, need you, need you so much
I really need your touch
Mexicali wont'you please be mine
E |----------------|  
B |-1-1-1-1-4-4-4-4|
G |-2-2-2-2-5-5-5-5|
D |-3-3-3-3-5-5-5-5|
A |-3-3-3-3-3-3-3-3|
E |----------------|

Oh baby please,be mine
E |------------------------|  
B |-3-3-3-1-1-1-4-4-4-3-3-3|
G |-4-4-4-2-2-2-5-5-5-4-4-4|
D |-5-5-5-3-3-3-5-5-5-3-3-3|
A |-5-5-5-3-3-3-3-3-3-5-5-5|
E |-------------------3-3-3|

Something like that...