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Discussion Starter #3
does a triple PS flush, mean lines, reservoir, and rack?
any specifics in ordering a new radiator?
do the $60.00-$70.00 cheapo Chinese ones on ebay do the job?
do they all have the correct coolers?
 

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1972
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OEM is Valeo. They last 10-15 years. 163 500 00 03.

Remove both PS cooler hoses from radiator and pressurize cooling system. This would confirm problem with radiator.

What makes you think coolant enters PS system?
 

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2000 ML55 sold😢 2013 ML500,😁 2015 C250 estate wagon, 1927 Dodge 4 sedan, 1929 Dodge
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You sure it's not just Low and has been air rated?
Is the power steering pump noisy?



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1972
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I assumed coolant due to orange milky color
If screen in PS reservoir has ruptured fluid will aerate and look milky with engine running. Take sample and put few drops into hot frying pan if it fizzles it has water or glycol in it.
 

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94 S420 RIP 2/8/13 02 ML55AMG, 06 CLS55AMG, 89 Mas. 228, 84 Por. 911 Carrera, 93 Toyota t.t. Supra
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I use a frying pan to check for boiloff my wife will use one on me. Lol. Suggest just a drop or two on the exhaust manifold. Same function without the angry wife. ;-). God luck.
 

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W163 ML320, W220 S500, R230 SL600TT, R170 SLK230, W140 S500, More
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So these cars actually have cooling system cool the power steering, is that incredible or what?
Next you'll be trying to say that the alternator is also liquid cooled!!!
 

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99 ML430, 00 ML320, 05 E500 4matic Wagon
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Just did one of those buggers last week. LOL

I wonder when all the electric power steering pumps on the market will start to act up.
 

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If screen in PS reservoir has ruptured fluid will aerate and look milky with engine running. Take sample and put few drops into hot frying pan if it fizzles it has water or glycol in it.
If screen in PS reservoir has ruptured fluid will aerate and look milky with engine running. Take sample and put few drops into hot frying pan if it fizzles it has water or glycol in it.
I have a 2007 ML350 4 Matic . I am getting water in my power steering system causing it to become very milky and leak at the cap as well as from the Control unit of the rack & pinion. Likewise, my anti freeze is getting contaminated and I get a "top off" message daily even though I top it off daily. Should I interpret your post as indicating that there is some crossover
between the anti freeze coolant and the power steering fluid?
 

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99 ML430, 00 ML320, 05 E500 4matic Wagon
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You will want to post the issue in the W164 section. This is the W163 section.
 

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2015 ML250 BluTec, 2002 ML 500 Sport Edition (Sold :(), 2012 C250
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I did post it there and under this one entitled "Coolant leaking into power steering" which is more on point.
But you don't have a W163 to Noodles' point. Different car. Different parts. Different diagnosis.

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But you don't have a W163 to Noodles' point. Different car. Different parts. Different diagnosis.

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But you don't have a W163 to Noodles' point. Different car. Different parts. Different diagnosis.

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Understood, thought maybe the power steering- radiator connection may be the same
 
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