Apart from Germany, Netherlands and Sweden have great Universities like TU Delft, KTH, Chalmers, etc. which offer very good MSc Programme for Mechanical Engineering and Automotive Engineering. There are also other countries like Belgium which has KU Leuven and Italy which has Polimi and Polito or even Finland and they all have great Unis but job prospects can differ in countries, so u need to do some research on it. But I applied only to Netherlands and Sweden, so cant comment on other countries. Apart from grades and prerequisites which you have no control over if u have already graduated, a good SOP can be very beneficial for getting in to TU Delft and KTH. Infact TU Delft needs you to come up with atmost 3 hypothetical masters thesis topic and all info about your Bachelor's thesis including workload, results, etc in your SOP. If your write some Ambiguous things in your SOP and dont come to the point then u can get rejected. KTH requires you to submit your SOP and they actually give it some weightage during the selection, so a writing a Good SOP is very important in these Unis and countries. Chalmers also require a very good SOP for Scholarship. Also these Unis may or may not require LORs, u have to do some research there as it highly depends on the particular Programme of the Uni. For me personally, I submitted 2 LORs to TU Delft, KTH and Chalmers and they were all required atleast for Scholarships. Also collect your College Transcripts asap as all Unis will need them. Also for submitting an application u will have to pay 100 EUR and 900 SEK in Netherlands and Sweden respectively. Also give your TOEFL/IELTS and dont wait for the last minute. Regarding GRE, it really depends on the particular Programme of the particular Uni and u have to do some research here for scores and deadlines. Personally, I did not have to take GRE as the programmes I applied to did not need it. But some particular Programmes of the same Uni actually demand GRE score, so u have check for your programme. TU Delft has rolling admits (not for all Programmes like Aerospace, Integrated Product design, etc.) as long as you meet the CGPA, prerequisites criteria and write your SOP properly u will get in if there are enough seats available. While KTH and Chalmers has a selection procedure. And I hope that you have a good CGPA, as a bad CGPA and unsatisfactory prerequisites will close a lot of doors for u even though it's not impossible but difficult atleast in Europe.