Mercedes-Benz models judged most reliable Mercedes-Benz is one of the winners in this year's compilation of breakdown statistics by the German motorists' association ADAC. The brand's passenger cars, including A-Class, M-Class, S-Class and E-Class received top marks in three automotive categories. The Mercedes-Benz A-Class was the winner in the "Lower Mid-Range" category, making it the most reliable compact car on Germany's roads, according to the breakdown statistics compiled by ADAC. The average breakdown rate for the 2004 models of the A-Class was only 2.3 per thousand. Equally impressive was the performance of the M-Class, which won top honours in the "Off-Roader" category. The average breakdown rate for the 2004 models of the M-Class was only 2.5 per thousand. The experts at ADAC were especially impressed by the Mercedes-Benz E-Class and S-Class, whose extremely low breakdown rates won them top spots in the "Upper Mid-Range/Luxury Class" category. click to enlarge