M-B dealers will accept orders for the A class from June and the car will be in European showrooms in early October.
The five-door model will be the first to be introduced followed by the three-door coupe-style CST version in January 2005.
Gasoline engines will range from 90hp -195hp, diesels from 85hp -140hp. For the first time, a continuously variable transmission (CVT) will be offered.
The B class SUV version will be premiered at the Geneva Motor Show 2005. B class sales will start midway through 2005 and exports to the USA in early 2006.
M-B SLK wins 15,000 orders
Mercedes-Benz already has around 15,000 orders for the new SLK roadster that was launched at the end of March.
Some 53,000 SLKs will be produced at the Mercedes-Benz plant in Bremen this year with 20,000 of these going to German customers.