How can I develop a good working relationship with my colleagues and customers in an automotive workplace?

The same way you should have learned to do it with other children and teachers in kindergarten. Be friendly, polite, honest and courteous. Wait your turn. Don't interrupt others when they're talking. Be helpful. Learn your job and then do it without shirking your responsibilities. Admit when you're wrong and have made a mistake. Smile, but don't fake it. Pay attention to hygiene.  It's not rocket science.

Listen more than talk.

Be respectful. Help others when asked. Explain everything to the customer in clear manner. 

Start by asking such sh*te in Careers & Employment.

Take them to a strip joint.