(Reuters) -Belgian car distributor and auto glass repairer D'Ieteren Group reported a 5.4% rise in first-quarter combined sales on Thursday at 3.06 billion euros ($3.30 billion) after a change to its accounting methods, and maintained its outlook for 2024.

The group, which distributes Volkswagen, Audi, SEAT, Skoda cars in Belgium, had reported combined sales of 3.83 billion euros a year earlier, which included 100% of earnings from divisions Belron and TVH.

D'Ieteren modified its accounting practices this year to reflect 50.3% in economic rights for vehicle glass repair division Belron and 40% ownership of aftermarket parts unit TVH. Details on reasons for the change were not immediately available.

The group reiterated its yearly forecast of mid- to high single-digit percentage growth in its adjusted profit before tax for 2024, but flagged a softer market demand environment.

Sales of the group's largest division Belron increased organically by 5.7%, on sales of more expensive products despite a 0.4% drop in volumes.

The company's automotive unit increased its market share to 23.4%, as sales rose 4.1% from last year, with growth in almost all businesses.

Moleskin, the group's luxury notebook brand, recorded a 6.3% organic decline in earnings, reflecting the impact of adverse policies at e-commerce platforms since early 2023, the group said, noting a negative currency impact.

(Reporting by Dimitri Rhodes and Dagmarah Mackos; Editing by Himani Sarkar and Bernadette Baum)