Production Engineering

It is difficult to say since your B.Tech percentile is very low for a German institute. Also, GRE is not required so weightage may not be given. If your SOP and LORs are outstanding you may stand a chance. A very good research profile, publications, patent work, etc. must be demonstrated.

Hello Sachin,
Both the branches are new, but production has less crowd and good scope as this is a new branch as compared to the automobile so you easily get a job. I strongly recommend Production Engineering.

Hello Deepthi,
Production engineering has a good scope as he said above . since he didn't tell about production engineering at PSG, I may tell you about it.
It is good that you have opted for PSG as it has its own industry so that there is no other better option than PSG.
The placements are really good at PSG due its reputation. For PSG placements you may refer below : http://www.psgtech.edu/placements/

You should go with mechanical from PU as it has good placements as compared with production engineering.
But UCOE DEPT is in Panjabi University, Patiala, you should definitely go with production engineering in GNDEC.