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Testing the new Mercedes-Benz C-Class



17th January, 2007

2007 Mercedes-Benz C-Class 

The 'World Test' was the fi rst part of one final examination staged before the new C Class entered 
series production. The test candidates, two fully equipped pre-production 
models, were put through their paces in South Africa, Germany, Scandinavia and 
the Middle East. Both vehicles covered a total distance of 52,000 kilometres.

When the new Mercedes-Benz C-Class is launched in mid-2007 in Europe, later in Australia, the Saloon will have completed the most comprehensive test programme in the Stuttgart manufacturer's history. Over a period of three and a half years, the prototypes and pre-production models have clocked up a total of more than 24 million test kilometres all over the world. The tests performed on the test rigs at the Mercedes-Benz Technology Centre in Sindelfingen were equally extensive and intensive. Here the body and chassis were subjected to one exceptionally tough test after another to simulate the loads and stresses of an entire car lifetime within a matter of weeks. Each kilometre of these endurance tests, which Mercedes-Benz also carries out on highly demanding test tracks, is around 150 times tougher than everyday driving. These extreme tests form the basis for the high long-term quality of the Mercedes passenger cars.

Testing of the new C-Class began in (Northern) summer 2003. A total of 280 prototypes completed systematic non-stop tests under various climatic and topographic conditions. These included the "Heide" endurance test, one of the world's toughest test programmes for newly developed cars. This torture-track test, carried out over a period of four to six weeks, goes back more than 50 years to a time when Mercedes performed much of its test driving on Lüneburg Heath ("Heide" is the German word for "Heath”). It is equivalent to 300,000 kilometres of everyday driving by a Mercedes customer.

2007 Mercedes-Benz C-Class 

The 'Heide' torture-track 
endurance test on the test rig runs for a total of 2,000 kilometres. In terms of 
the stresses and loads exerted on the car, this is equivalent to a Mercedes 
customer driving 300,000 kilometres.

Mercedes-Benz replicated these pothole and cobblestone-covered routes at its facilities in Stuttgart and Sindelfingen and now uses the data gathered during these in-house tests to control test rigs. This means the highly sophisticated rigs can relentlessly shake and bend car bodies around the clock to reproduce the driving conditions experienced during the "Heide" torture-track endurance test. The forces acting on the connecting points between the chassis and body are immense – up to 20,000 Newtons – and they occur in quick succession. This is equivalent to a weight of up to two tonnes.

Durability testing: one of the world's toughest test programmes

The computer data compiled during the "Heide" torture-track endurance test are also used for chassis durability testing. Complete front and rear axles go through this unique series of tests around the clock on six servo-hydraulic test rigs. Mercedes engineers use four further installations to test the wheels, wheel bearings and wheel hubs for 60 hours non-stop on a simulated Hockenheimring Grand Prix circuit, during which time the chassis components are subjected to colossal lateral forces that stretch them to breaking point.

2007 Mercedes-Benz C-Class 

Durability testing of the C-Class included a series of long-distance tests in everyday traffic and on 
proving grounds, during which the focus was placed on specific parts, 
components or functions. These tests included several trailer endurance tests, 
each covering 25,000 kms, as well as test drives on race circuits such as the 

Similarly, the axle joints and bearings have to withstand extreme loads before they get the go-ahead for series production and installation in the new C-Class or other Mercedes models. In addition to permanent pressure and movement tests with forces of up to 35,000 Newtons, axle components must also resist extremely high temperatures of 90 degrees Celsius – verified in axle-joint field tests in city traffic in Tokyo.

Mercedes passenger cars also have to endure other simulated everyday conditions during testing, such as a high-pressure water jet (80 bar) and the systematic spraying of the joints with ice-cold dirty water and fine, hot sand dust over a period of three weeks. The most extensive test cycle in this environmental simulation lasts three weeks and includes over one million axle-joint load cycles – far more than any Mercedes-Benz usually experiences during its long lifetime.

The Mercedes-Benz Technology Centre has a total of around 160 innovative test rigs for chassis component durability testing alone.

"World Test" on three continents

Following a series of systematic long-distance tests in everyday traffic and at proving grounds, during which the cars were subjected to such high loads and stresses that they aged at a vastly accelerated rate, the 18-week "World Test" was one of the highlights of the systematic test marathon for the new C-Class. Four fully equipped pre-production vehicles successfully came through the tests in Germany, Finland, Dubai and Namibia. Here, under widely fluctuating climatic and topographic conditions, all of the vehicle components and systems – from the diesel particulate filter to the seats, from the door hinges to the shock absorbers – were tested once again.

2007 Mercedes-Benz C-Class

Furthermore, 15 new C-Class pre-production models took part in a stiff final examination before production launch, involving tests in six countries within a period of seven months. Never before has a newly developed Mercedes model undergone such an extensive additional test programme – and passed with such flying colours.

For the final field test before production launch, Mercedes-Benz will be sending out around 450 new, factory-produced C-Class Saloons for "near-launch road trials" in which DaimlerChrysler employees will test the new model in normal everyday situations, covering a total of around 16 million kilometres in the process. This exhaustive series of tests is designed to ensure top quality right from the start.

Other Mercedes-Benz news is: here

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