Mercedes-Benz has released details on the 4matic all-wheel drive system it will use in the upcoming CLA four-door coupé, shown here in official spy shot pics. They’ve also gone to the trouble of explaining how a tailored 4matic system will be applied to the cooking CLA 45 AMG model.
On first reading, 4matic sounds a bit similar to the Haldex system employed by the Volkswagen Group, among others. That is, the Benz 4matic system will operate is front-wheel drive as a default setting in order to maximise fuel efficiency. Mercedes claims their all-wheel drive system will be around 25% lighter than similar systems used by other car makers.
When required, power is sent to the rear axle through an electrohydraulically actuated multi-disk clutch. Mercedes says the guiding principle of the system is to use it “as often as necessary, as rarely as possible.â€
The 4matic system will be coupled to a 7-speed double clutch transmission which has three settings: eco, sport and manual. In sport and manual modes the tolerances for the transfer of power to the rear axle are more focused, allowing for a quicker response and more dynamic handling.
Mercedes has hinted at the engine specs for the CLA 45 AMG saying the 2.0 litre turbo four will boast well over 400Nm of torque. So around 450Nm like the M135i, then?
Both the CLA 45 AMG and the A 45 AMG have been confirmed for Australia. The AMG versions will trail the Australian launch of their matching entry-level models by roughly six months.
The A 45 AMG is scheduled to go on sale locally in the latter half of next year, while the CLA 45 AMG is due to arrive in early 2014.
There’s more detail from Mercedes after the break, including some nerdy diagrams showcasing the 4matic’s tricky bits. Really, you have to check it out just so you can discover what an integrated power take-off unit is!











