S-Class S/W Mode? - Page 2 - Mercedes-Benz Forum

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post #11 of 23 (permalink) Old 02-23-2006, 04:58 PM
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RE: S-Class S/W Mode?

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Bho - 2/23/2006 6:08 PM

Excuse my ignorance, but why would you turn ESP off? I thought ESP would apply slight brake to wheel that was skidding, hence eliminating skid?
That is correct if you are moving.

But let's say you are stuck in the snow, and need to get out. It's better to leave ESP off.

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post #12 of 23 (permalink) Old 02-23-2006, 05:00 PM
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RE: S-Class S/W Mode?

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Bho - 2/23/2006 5:08 PM

Excuse my ignorance, but why would you turn ESP off? I thought ESP would apply slight brake to wheel that was skidding, hence eliminating skid?
So did I, but apparently if your tires cannot get a grip (so to speak), ESP will simply stop the car. It did that to me a few times before I realized what was going on and turned it off. Slowly but surely the car began to move up the grade. That's when I called Luke at The Tire Rack and ordered the X-Ice (his recommendation). In fact, he said not to get the best-rated winter tire (Bridgestone Blizzaks?) because, according to him: "My car would hate the Blizzaks, because the ESP system would mistake slick hills for loss of control and stop the car." Which is exactly what was happening w/ my OEM tires.
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post #13 of 23 (permalink) Old 02-23-2006, 05:50 PM Thread Starter
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RE: S-Class S/W Mode?

Ooooohhhh, kind of makes sense. I didn't realise that ESP would try to stop the car. I was under the impression it would deploy slight braking to an individual tire that was skidding. Hmmmmm, I don't think I will need to turn it off or have winter tires because snowfall isn't that bad here in the UK...seems to be getting worse though over the years. Winter mode seems to do the trick so far[:D]
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post #14 of 23 (permalink) Old 02-23-2006, 05:55 PM
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RE: S-Class S/W Mode?

Actually, I don't think ESP applies the brakes, it just doesn't allow the wheels to accelerate--at all.
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post #15 of 23 (permalink) Old 02-23-2006, 07:02 PM
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RE: S-Class S/W Mode?

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Jayhawk - 2/23/2006 4:55 PM

Actually, I don't think ESP applies the brakes, it just doesn't allow the wheels to accelerate--at all.
Wrong!
ESP works by applying the brakes. It suppose to be slight braking, but you don't need much on snow to skid out of control.
It is traction control, that adjust the engine power in case of all wheels spinning.
I was quite annoyed finding it out, when in the moment I had fun on icy, empty parking lot, the computer disconnected me from the engine control and with gas pedal on the floor the engine was idling.
I called Mercedes head office with complain, but they couldn't help me. [:D]
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post #16 of 23 (permalink) Old 02-24-2006, 05:02 AM Thread Starter
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RE: S-Class S/W Mode?

OK, also I heard that the manual over-drive gears should only be used in emergancy for engine braking. Any thoughts on this? Also in the mercedes manual, it says it has 5 manual gears, wheras in reality its 1st, 2nd, 3rd, 4th, D!!!
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post #17 of 23 (permalink) Old 02-24-2006, 09:50 AM
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RE: S-Class S/W Mode?

There are different schools on using engine for braking. Most of manufacturers not advise it, taking liability off them if something goes bad. Another excuse is, that converter is not design to work in reverse.
That all proves to be lie in motorhome and smaller truck industry, where automatic transmissions are used for vehicle braking all the time. Sure the brake pads are cheaper, than converter replacement, but can you image how much energy takes to slow down 15-ton coach going down 16-mile 6% grade?
So, leaving in the mountains and driving lot of grades in California, I am using transmission for car braking all the time. Not necessary for saving the brake pads, but for smoother drive and comfort.
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post #18 of 23 (permalink) Old 02-24-2006, 10:09 AM
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RE: S-Class S/W Mode?

Brake pads are cheap and easy to replace. Transmissions very expensive and very difficult to replace. I'll use my breaks.
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post #19 of 23 (permalink) Old 02-24-2006, 03:22 PM Thread Starter
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RE: S-Class S/W Mode?

So is there any point to the manual transmission other than engine braking?
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post #20 of 23 (permalink) Old 02-24-2006, 05:26 PM
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RE: S-Class S/W Mode?

Quote:
Kajtek1 - 2/23/2006 9:02 PM

Quote:
Jayhawk - 2/23/2006 4:55 PM

Actually, I don't think ESP applies the brakes, it just doesn't allow the wheels to accelerate--at all.
Wrong!
ESP works by applying the brakes. It suppose to be slight braking, but you don't need much on snow to skid out of control.
It is traction control, that adjust the engine power in case of all wheels spinning.
I was quite annoyed finding it out, when in the moment I had fun on icy, empty parking lot, the computer disconnected me from the engine control and with gas pedal on the floor the engine was idling.
I called Mercedes head office with complain, but they couldn't help me. [:D]
Actually, I read the manual this afternoon (I was bored), and it said that ESP does in fact limit torque, and engine power to the wheels.

4-ETS does not limit engine power.

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