Mercedes ASR vs ESP: what's the difference?
My 97 E420 has ASR, but not ESP. Is ASR the standard traction control, and the ESP an even fancier computerized traction control? If I don't have the ESP, am i doomed to drive on snow with 16" regular all-season tires in SE MI??? :confused: I was fine with 16" all season tires in my 5speed manual RWD BMW but that car had all kinds of electronic safety features like ASC+T, DSC, etc etc..... :book:
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If memory serves me right
ABS - helps in braking, so ur wheels don't lock ASR - helps in take off, so ur wheels don't spin ESP - controls yaw, which is the left-right weight shift of the car, like taking a corner |
ESP is a more advanced ASR. Its more of a stability control in all driving conditions while ASR is more of a traction control to get you moving.
http://www2.mercedes-benz.co.uk/content/unitedkingdom/mpc/mpc_unitedkingdom_website/en/home_mpc/vans/home/products/new_vans/vito_new/overview/safe/driving_stability.0002.html |
ESP will work with all wheels and apply brakes to individual wheels to make the car go in a straight line. It's the same technology used in the current mercedes models. you can visit www.mbusa.com and click on the video for more information. ASR was a slip reduction technology that worked with rear wheels. ESP uses a yaw sensor as well as steering angle inputs.
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Got to sit in new CLS on a demo ride around the skid pad in Unterturkheim last July.
Cobblestone; wet. With ESP on, little drama. With ESP off, car spun off every time. |
ASR cuts the throttle and/or retards the ignition timing demand to the engine when it detects wheel spin, therefore reducing the torque output of the engine, to prevent overpowering the drive wheels in low-traction situations. ESP will apply brakes to individual wheels during a slide, therefore bringing the vehicle back under control with little or no steering input. ASR was incorporated into the ESP system as well.
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Quote:
earliest system that will use the two rear wheel brakes to simulate locked differential (or Limited Slip Differential, LSD) in addition to reduced motor power. Turning off ASR on a car with ASR will retain ETS up to 80km/h. Read more abour ETS, ASR, ESP and 4Matic of Mercedes compared to systems from BMW, Audi and Volvo here (in german, but with illustrations); http://www.pvv.org/~syljua/merc/Fahrdynamiksysteme.pdf br, syljua, with ESP, ASR and ETS, that did not stop me from being trapped in the snow this morning (hard snow trapped under car) ;-) |
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