As Tesla goes mainstream, luxury carmakers plan rivals to shake up the market for electric cars By: CNBC.com News July 29, 2017 at 07:00 AM EDT As Tesla takes its high-end cars to the mainstream, several luxury carmakers are planning competitors. Read More >> Related Stocks: Bayerische Motoren Werke ADR General Motors Mercedes Benz Group Ag Nissan Motors ADR Tesla, Inc.