Iam interested to study in germany....which course is best in germany either mechanical or automobile?

Candidates interested in pursuing a Master's in Mechanical Engineering in Germany must meet the following primary requirements:

Candidates must have a bachelor’s degree in a related field of study
German universities could require GMAT/GRE scores for admission (optional)
For pursuing MS in Mechanical Engineering in Germany, students must have the below-mentioned language requirements:
Knowledge of the German Language for admission to Public Universities in Germany by appearing for German Proficiency Tests
Knowledge of the English language by appearing for the following English Proficiency Tests such as IELTS, TOFEL iBT or PTE 
Minimum of 2-3 years of work experience (subject to the university admission criteria) for getting enrolled in German universities. (optional)
Motivation letters [Statement of Purpose (SOP) /  Letter of Recommendation (LOR)] and Admission Essays
Copy of certificate as well as grades of all lectures in the pre-study
Students who want to study Automobile Engineering in Germany must meet the following eligibility requirements in order to enrol in one of Germany's top colleges:

The students have to complete 10+2 from a recognized board of education if enrolling on the bachelor’s program.
If you’re going for a master’s degree, then graduation in a relevant field is a prerequisite.
Proof of work experience, if required.
English language proficiency test scores – IELTS/TOEFL/PTE.
In case, you are opting for German as an MOI, then you have to clear TestDaF or DSH tests. 
Documents like SOP, LOR, resume, cover letter, etc also have to submit.
You can choose the subject according to your educational qualification. If you have any further questions just ask me.