April 16 (Reuters) - German automotive supplier Continental's revenue and profit margin were lower than market expectations during the first quarter, it said on Tuesday, citing labour costs and continuing price negotiations with customers.

In an unscheduled statement, Continental said first-quarter sales amounted to 9.8 billion euros ($10.41 billion), below an analyst consensus of 10 billion euros, with an adjusted EBIT margin of 2%, against a consensus forecast of 3.7%.

The company also reiterated its full-year guidance. ($1 = 0.9414 euros) (Reporting by Ludwig Burger Editing by David Goodman)