ASR Button

M

muscailie

Member
hello!

can someone explain me better how and when to use the ASR function?

i know what ASR is for, it`s meant to help you when driving on slippery or wet roads, in winter etc..

but why isn`t this function always activated? and why if i activate it, it self turns off ?

i`m pressing the button and in the next second the yellow exclamation mark dissapears.

why? is that how it suppose to happen?

i haven`t tested ASR on slippery roads or on wet roads yet
 
thank you very much ! now everything makes sense for me :)

ULP said:
ASR (anti-slip regulation) is always on automatically. It is only turned-off by pressing the button, at which time the warning light (orange 'wheel' with gravel spitting from it) lights up on the dashboard, which is the opposite to what I think you understand it to be.

Warning light illuminated = ASR switched off.

Warning light not illuminated (apart from when starting the car for a few seconds) = ASR switched on.

ASR is most useful when pulling-out of junctions on wet leaves (as I discovered today).

However, a word of caution. Like all traction-based devices they tend to be of little use when pulling away on snow/ ice. Each wheel will search for non-existant traction and the car will go nowhere as the ABS sensors (which manage the ASR) will go mental and overheat themselves!! When pulling away in such conditions, it is best to turn the ASR off until momentum has been achieved, at which point ASR should be re-activated.

ASR can be turned on at any speed. It can only be turned off up to speeds of about 35mph (although I am not 100% sure exactly when). Pressing the button above this speed will simply illuminate the light for a second, then it will go out.

I hope this helps
Click to expand...
 
I remember clearly some of the very first tests I read on the A2 in 1999 they said it handled even better with the ESP switched off... Now this statement always made me wonder: Did they know the difference between ESP and ASR and how can it handle so much better if the ASR comes back at 45mph? Or is there another way to switch ESP on or off?

ESP saves more lives than airbags according to Mercedes so I don't really want it off, but to get your tail to twitch a bit on a roundabout if you are in the mood you will need ESP off. Anyone know how to do that?
 
LOL yes very true... I’m a firm believer in having ESP believe me. I just want to sometimes feel what it is like sans ESP to even appreciate it more!
 
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