What causes a steering whine, and trouble steering?

155

Asked by Sep 05, 2013 at 03:42 AM about the 2001 Mercedes-Benz M-Class ML 55 AMG

Question type: Maintenance & Repair

I get a whine when I turn the wheel and sometimes it gets tough steering.  There is no
fluid leak, and so I don't have to be putting in fluid.  On MBWorld, I found someone
mentioning a speed steering sensor.  I am hoping it's as easy and cheap sounding as
that but, I cannot even find this part online.  The dealership suggests to replace the
pump and rack but, I think they're trying to get the most $$ out of me.
  Any suggestions?

5 Answers

I had a Lincoln Town car, with a similar device, I don't remember what Ford calls it. It is an orifice in the high pressure hose where it connects to the P/S pump to prevent over steering at high speed, I am sure MB has a much more sophisticated way of doing the same thing, on the Town Car is was not a sensor, a simple orifice to restrict hydraulic fluid flow at high speed. That car, heavy as it was, you could turn the wheels at a stop with one finger effortlessly. Making it too easy to over steer in a panic swerve at 75mph. Which all of that doesn't come close to answering your question...90% of the time, that distinctive growl sound is low fluid, and the entire rack replace? Possible but unlikely, even in a 2001 the steering rack should not be warped..unless it's been in a collision...

4 out of 4 people think this is helpful.

This picture are some of the components of M/B Electronic Stability Control, which includes ABS brakes and a 'steering speed sensor', among other things... that may be why you found nothing in a search, looking for 'speed steering sensor'

5 out of 5 people think this is helpful.
155

fault code 197002 is what the dealership say's, and they also recommend replacing the ESP/BAS hydraulic pump, relay, & fuse. I cannot even find a price on that pump. I've never even heard of such a pump, and I've been in the automotive business for many years. Is that sensor also called a Lateral Acceleration Sensor/yaw Sensor? Found it new for $120.00 I also was told that the shifter bushings are missing. Another part I've never heard of but, then again, it's the first Benz I am about to work on so, yeah. The torsion bar plates also, which I am guessing is just another fancy word for the sway bar bushing kit. I need pretty much a replacement of all the bushings in the front end, and would like to replace the old ones with polyurethanes.

1 out of 1 people think this is helpful.
120

I don't know I'm not a Mechanic.

23,065

From what Ive read about on the ML they all seem to have this issue at some point and time. As said before from what ive seen online the the steering pumps seals start to fail and cause this whine noise.

Your Answer

Add photo

Related Questions

M-Class

Looking for a Used M-Class in your area?

CarGurus has 5,250 nationwide M-Class listings starting at $1,495.

ZIP:

Search Mercedes-Benz M-Class Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercedes-Benz M-Class Experts

#1 jihadghazali
jihadghazali
Reputation 1,080
#2 wellness
wellness
Reputation 850
#3 123Benze
123Benze
Reputation 550
View All

Related Models For Sale

Used BMW X5
510 Great Deals out of 15,565 listings starting at $2,500
Used Mercedes-Benz E-Class
368 Great Deals out of 22,691 listings starting at $1,450
Used Mercedes-Benz C-Class
674 Great Deals out of 32,359 listings starting at $1,990
Used Mercedes-Benz S-Class
86 Great Deals out of 7,451 listings starting at $2,300
Used Mercedes-Benz G-Class
34 Great Deals out of 974 listings starting at $22,800
Used Jeep Grand Cherokee
920 Great Deals out of 66,786 listings starting at $1,500
Used Acura MDX
334 Great Deals out of 15,900 listings starting at $1,500
Used Land Rover Range Rover
91 Great Deals out of 4,789 listings starting at $5,000

Used Cars For Sale

2015 Mercedes-Benz M-Class For Sale
16 Great Deals out of 462 listings starting at $31,775
2014 Mercedes-Benz M-Class For Sale
42 Great Deals out of 1,254 listings starting at $22,900
2013 Mercedes-Benz M-Class For Sale
14 Great Deals out of 420 listings starting at $19,999
2012 Mercedes-Benz M-Class For Sale
20 Great Deals out of 395 listings starting at $18,888
2011 Mercedes-Benz M-Class For Sale
20 Great Deals out of 422 listings starting at $11,995