I have completed my diploma in automobile engineering. I wanted to what are my chances are of getting in a degree college for mechatronics in Germany. If possible what procedure do i need to follow.?

Yes, you can pursue a B.Tech in Mechatronics engineering abroad, particularly in Germany. However, because there are fewer spaces for international students and a large number of candidates, you must work hard to be picked by German Institutes. You must achieve excellent results in the following entrance exams:

IELTS
SAT
Following that, you must create a compelling CV and statement of purpose and apply online to German institutes. After being chosen, you must confirm your admission and apply for a student visa. Here is a list of colleges that you can target:

Ilmenau University of Technology
University of Coburg
University of Saarland
University of Applied Sciences Wuerzburg-Schweinfurt
Technical University of Munich
HTW Berlin University of Applied Sciences
Furtwangen University
Baden-Wuerttemberg Cooperative State University
RheinMain University of Applied Sciences
Otto-von-Guericke University Magdeburg
If you have any further questions just ask me.