20VoFRDM

The other night i noticed a fairly loud noise under the hood. I located the noise to the power steering pump/pulley. I had a similar problem last year when it got cold.

Am i low on power steering fluid? if so where is the reservor? if not, any ideas on what the noise could be?

Please help me!

Chedman13

Don't you love Benz's, they all have predictable problems.....

I'm have the same issues on my 99 ml320 but never paid any attention to it. If someone knows an answer... that would be great=)

20VoFRDM

Anyone!!?

mercedestech1

All MB's power steering fluid magically dissappears when it gets cold. I honestly have no explanation for this-usually no visible leaks and its usually too low to assume that its from contraction of the fluid due to temp change. Add fluid and check for leaks. The resevoir is on top of the pump.Its a black plastic tank with a black plastic cap.Good luck.

55fanatic

take off your engine cover and its on the right side by the headlight, you can see it, I also have the noise problem, but mine is coming from a substantial leak, not sure where but I am gathering puddles in my driveway

StillKickin

My dads ML has the same problem it sounds like a god damned whale being killed...he ignores it though, will it cause any long run problems?

mercedestech1

The fluid in a power steering system is not only for hydraulic assist-it's also used to cool and lubricate the components of the power steering system-if the fluid level is low the fluid will aerate,and in turn lose some of its lubricating qualities. Low lubrication=High friction=damage to pump. A bottle of power steering fluid costs a whole lot less than a power steering pump.

timdf

My PAS pump has been dripping fluid for a while now and sadly its from the front of the pump, not the resevoir. So I fgure it's time for a new pump...

http://www.trademotion.com/partlocat...=1&catalogid=2

Is this a DIY ? I'm fairly handy with a wrench, but am concerned about getting the right tension back on the belt and purging the PAS pump of air.

Tim

ronman

The wifes ML350 was just in for service. I had noticed a slight noise that I attributed to power steering although there was no visible leak and the fluid was not low. MB replaced the hose under warranty and said there was a slight leak. We didn't even mention the noise. Since this sounds common I guess they look for it. BTW... Anyone DIY brakes on an ML 350. I've ordered the parts and plan on trying it this week. Looks like I'll need a torx bit. Any other instruction would be great.
R

20VoFRDM

Is there a special MB recognized power steering fluid that should be used to top off?

StillKickin

Is the cap to the right of the oil cap the one where you put the power steering fluid, the hose is wet, its kinda wierd.

contoree

I had a nasty noise in my power steering pump everytime i turned the wheels.The fluid was high but i found out it was the oring leaking and i diy'd myself filled her up and its been prefect ever since.I believe there is a step by step on this forum

threeptstar

Do you know where the DIY is on this forum?. I searched and could not find one.

Also, I have a leak from one of those circular things with a torx bolt. Do you think this could be an O ring issue?.

sammydragon3

having low ps fluid will not only destory the pump but it

will destroy your rack & pinion thousands in repairs?

dont be cheap get your **** checked out