FRANKFURT -- Volkswagen brand was among the few gainers as German vehicle sales fell 5.8 percent in May.
Overall registrations in the market were 305,057, the KBA motor vehicle authority said on Monday.
IHS Markit said the month saw a big drop-off in commercial registrations, including dealer pre-registrations. This may be an indication that dealers and automakers are throttling back on stock levels over concerns of overly high inventories, the forecasting firm said.
Sales were down 1.9 percent adjusted for one less selling day, according to analysts Evercore ISI.
VW brand sales rose 5.8 percent last month helped by its new T-Roc SUV. The marque, which is the market's top-selling brand, has now posted five months of consecutive gains.
Other winners included VW Group's Seat brand, whose sales rose 9.6 percent, boosted by the Arona and Ateca SUVs.
PSA Group's DS upscale brand saw volume jump 45 percent, while Dacia sales were up 11 percent, Alfa Romeo sales increased 8.9 percent and BMW's Mini brand gained 2.5 percent.
Opel, Fiat among losers
Most other brands had a poor month.
Opel sales fell 15 percent and Fiat was down 14 percent while Peugeot sales fell 9.9 percent and Citroen volume dropped 8.1 percent.
Sales at Ford declined by 6.5 percent. Skoda was down 2.5 percent.
Among Asian automakers, Hyundai sales fell 10 percent, followed by Toyota with a drop of 5 percent and Kia, which declined 2.6 percent.
• Download PDF, above right, for German sales by brand for May.
All three luxury German brands suffered losses last month as BMW dropped 16 percent, Mercedes-Benz 13 percent and Audi 0.4 percent.
Registrations of diesel cars fell 27 percent last month, giving diesel a share of 31.3 percent of the market. Registrations of gasoline cars rose 6 percent for a 64 percent market share.
Through May, German sales are up 2.6 percent to 1.49 million.