Finished in factory correct Goodwood Green and red Connolly leather, this 1960 Aston Martin DB4 is expected to bring up to $690,000 at the RM Sotheby’s London auction. Get all the latest auto industry news in the Executive Briefing. 

Today’s headlines: 

+   Fiat Chrysler Automobiles posted a 3 percent sales gain in August compared to the same month last year, while sales at General Motors fell 5.2 percent and sales at Ford fell 8.4 percent, signaling that the auto boom is ending. More at The Detroit News. 

+   The United Auto Workers urged Volkswagen to accept the National Labor Relations Board’s order requiring the automaker to bargain collectively with the union at its Tennessee plant. More at Reuters. 

+   The Porsche Macan Turbo is now available with a Performance Package boasting 434 hp, making the family crossover quicker than a 911 in 0-to-62 mph. More at UK Autocar. 

+   After 15 years and 11 Grand Prix victories, Williams Formula 1 driver Felipe Massa of Brazil has announced he will retire at the end of the 2016 season. More at BBC Sport. 

+   Nexteer Automotive President and COO Laurent Bresson, 44, has resigned, to be replaced in the interim by senior VP Michael Richardson. More at Crain’s Detroit Business. 

+   With Labor Day marking the close of the summer gasoline season, 2016 has seen the cheapest summer at the pump in 12 years, and consumers have saved $19 billion. More at the Portland Press Herald. 

+   A federal judge has approved Volkswagen’s agreement with the state of California to pay $86 million in damages related to the diesel emissions cheating case. More at Bloomberg.com. 

+   A trio of original, low-mileage Aston Martin DB4 models will star at the 2016 RM Sotheby’s London auction on Wednesday, September 7. More at Sports Car Digest. 

+   Google will expand its Waze smartphone navigation app into a ride sharing service, beginning with a pilot program in the San Francisco Bay Area. More at CBS News. 

+   Indy 500 winner Alexander Rossi is reportedly weighing multiple options for 2017 in IndyCar and Formula 1, including a full season with Andretti-Herta Autosport. More at Racer. 

Review the previous Executive Briefing from August 29 here.

Photo by Tom Wood for RM Sotheby’s. 

Have you joined Mac’s Motor City Garage on Facebook? It’s lots of fun with rare photos, car lore, trivia, and great discussions. Click here to go the page and join MCG. Be sure to check out our companion Facebook page MOTOROLOGY, too.