Electric steering conversion? - Mercedes-Benz Forum
 
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post #1 of 8 (permalink) Old 04-19-2019, 11:45 AM Thread Starter
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Electric steering conversion?

I have seen a few youtube videos like this:


and it got me thinking just maybe this could be possible on our w163s. Anyone ever considered it?
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post #2 of 8 (permalink) Old 04-19-2019, 12:04 PM
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Any know problems with electrical failure? It would be terrible if a problem occurs and there's no power steering. Is it fully electronic?


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post #3 of 8 (permalink) Old 04-19-2019, 12:13 PM
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I donít think it would work on the MLís. It might be ok for cars with no power steering at all but for that to push fluid through our rack wouldnít last very long.
The electric steering motor on the W166 is 3 times the size of that one and has 6mm wires going to it.


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post #4 of 8 (permalink) Old 04-19-2019, 06:58 PM
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What would be the benefit of such conversion?
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post #5 of 8 (permalink) Old 04-20-2019, 10:54 AM
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Originally Posted by johnd89 View Post
What would be the benefit of such conversion?
In general, electrical assist power steering offers two benefits. One is that it slightly improves engine performance and efficiency. The slight increase in drag on the alternator for its electricity is much less than the drag from a hydraulic pump. That might offer a very tiny benefit on the ML. The other is that the assist motor is also used to automate the steering for nanny systems like Lane Keeping Assist and automated systems like self-parking features. Those, of course, are no benefit to the ML.

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post #6 of 8 (permalink) Old 04-20-2019, 05:16 PM Thread Starter
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I am not so brave to be the first to do it but it seems very interesting
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post #7 of 8 (permalink) Old 04-20-2019, 06:53 PM
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A little added efficiency would be neat on a hog like the ML, I do seem to recall the first implementations of electric assist being blamed for a fake feel vs hydraulic.
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post #8 of 8 (permalink) Old 04-21-2019, 07:46 AM
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The efficiency improvements would likely not be noticed. There is a small improvement, but it's mostly used as a CAFE credit for the 54 MPG by 20020 requirements. In case you don't know, there will be no cars that actually get 54 MPG by 2020, but the government gives manufacturers "credits" for "trying". Doing anything that minutely improves MPG gets a much larger credit than the actual improvement in MPG. Electric power steering, reducing weight (often be deleting the spar tire and tools), using higher efficiency LED lighting, low-rolling resistance tires, auto-stop engine technology to prevent idling, and a few other things can get them nearly 20 mpg in credits so they end up only needing to get about 35 MPG CAFE. On top of that, CAFE calculations are much more lenient that the EPA calculations used for the Monroney Label, so that 35 MPG is more like 28 MPG combined. So for the constituents who bought into all this and are heading out to buy 54 MPG cars next year, have fun in your Priuses.

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