"We do not expect a deterioration in margins. Our advantage is that all our brands have the same platform for electric products and the same batteries that we buy in China," Diess said in an interview with daily la Repubblica's Monday supplement A&F.
Diess said the German car maker expected to sell nearly 20,000 Audi e-Tron in 2019, adding the first year's production of the electric Porsche Taycan was already sold out.
Orders for the VW ID.3, the group's recently unveiled compact electric model, are already covering the production planned until mid-2020, Diess said.
Last month at Frankfurt auto show Germany's premium automakers marketed electric cars as their flagship models to lure customers away from gas-guzzling SUVs.
Diess said he was concerned by the trade war between the United States and China, which was already causing a fall in Volkswagen's Chinese sales even if its market share in the country had been growing in the past six months, reaching 19pc.
In any case, Volkswagen does not plan to cut its exposure to the Chinese market, Diess said.