AEROMEXICO JOINS CONTINENTAL AIR BID DATELINE: NEW YORK, OCT 6, REUTER Aerovias de Mexico SA said it and a related investor group joined the previously announced -led bid to acquire a controlling interest in Continental Airlines by bringing $100 million to the deal. With Aerovias de Mexico SA (Aeromexico) and a the related investor group, the bid, led by Maxxam Chief Executive Charles Hurwitz, is worth $400 million. It was not immediately known if the bid was raised. Aeromexico said it will contribute $50 million of its own money to the buyout bid, under which it and its investor group plan to acquire six pct of Continental's convertible preferred stock or about 20 pct of the carrier's total equity. Aeromexico said its investment will be structured to conform with existing U.S. laws and regulation and will be subject to U.S. Bankruptcy court approval and certain other conditions. Aeromexico cited the North American Free Trade Agreement as a factor that would enhance the deal's advantages, including "savings, synergies and revenue opportunities that should arise for both Aeromexico and Continental. Besides Hurwitz, the Maxxam buyout group includes Donaldson Lufkin & Jenrette and Kidder Peabody & Co. Reuters, Limited October 6, 1992, Tuesday, BC cycle SECTION: Financial Report.