Loss of Power Steering Due to Leaking Steering Rack on Mercedes-Benz ML350

It is not uncommon for the power steering rack to develop a fluid leak requiring replacement of the rack assembly. Loss of power steering fluid may also cause an abnormal noise and damage to the power steering pump.

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Average mileage: 80,384 (30,000–200,000)
10 model years affected: 2003, 2004, 2005, 2006, more2007, 2008, 2009, 2010, 2011, 2012
134 people reported this problem
71 people shared problem details
My 2008 ML350 has developed a very tight steering issue, especially when stopped or moving slowly. The driver can feel flat spots when trying to turn the wheel and the wheel is very difficult to turn. After a decent amount of driving time, it seems to ease up, but for shorter commutes the hard steering lasts the entire time. Power steering fluid has been topped off but wasn't noticeably low when checked. This is a safty concern and it worries me that Mercedes is aware of this, due to the number of customer complaints, and has done nothing about this. Many of these vehicles are driven by females, namely mothers with children, and this problem should be looked into and a permanent repair should come from Mercedes.
Had to replace the power steering at 59000 miles. Just learned that there was a recall. I was never notified of this by the dealer since I did not own the vehicle when I they sent out notices. So aggravated and seeking recourse.
I can't believe it. I just paid off my car and now I have to deal with expensive repairs. This is my 2nd Mercedes. I will never buy another one again.
ML350 made winding sound when putting vehicle in motion. Sound would go away as vehicle sped up, but would return when slowing down at lights or to make turns. Discovered small leak of power steering fluid. First look it appears from the hose and not reservoir.
Noticed leakage on garage floor. Placed drip pan underneath and determined that leakage was power steering fluid. Took to dealer (7th MB, always take to dealer-better results). Dealer said probably steering rack. Options: 1) replace rack, ~$3,000 or 2) install "seal replacement kit", ~1,500. Plan to keep vehicle as has been bulletproof till now. Mech found leak where P/S fluid reservoir attaches to pump and resealed it. Brought home, cleaned garage floor and parked truck. Next day noticed more leakage. Back to dealer. Now mech finds leak at the input shaft on the steering rack, same options. Upon questioning mech says the dealer (small dealership) has done this replacement (option 2) several times and has had no come-back on it so I went with that. Job is labor intensive in that to remove steering rack, the front differential and a support member have to be removed and replaced. Obvious MB knows of this issue but haven't been able to find any MB tech bulletin on it. Update: Vehicle now has 173,000 miles on it. I had the seals replaced in the steering rack. About $30.00 worth of parts but seriously labor intensive-have to remove front differential and other big stuff. Total bill, including 4-wheel realignment was $1,738. Have had no further problem with that in last 43K miles. Did have big issue with torque converter not locking up when it should. Dealer replaced it and flushed transmission about 20K miles ago and no further problem. That burned up $3000.00. Still love the vehicle. Bought new Porsche Cayenne diesel for long road trips, but the ML-350 just keeps on chugging.
I heard a loud noise when I was trying to steer, I took it to a local shop and said all the power steering liquid had leaked out. Took it to the dealer and said the power steering seals needed to be replaced.
Just learned that my steering rack is leaking and needs to be replaced. $1500 for the parts plus $600 labor. Called Mercedes, they told me there is no recall on that.
My car has been leaking power steering fluid since about 110,000 miles. I now constantly replace the fluid on a regular basis rather than paying the $1500 repair cost.
Power steering leak replaced the unit holding fluid starting to leak 50,000 miles later or 2 years.
Noticed after a month purchase My power steering was low and the steering wheel made screeching sounds and the car started idleing high. Checked the reservoir and it was empty mechanic replaced the fluid and approximately two weeks later the steering wheel was screeching again
Leaking power steering fluid - not repaired yet. MB dealership will top off the fluid reservoir for no charge, probably due to the $4195.00 cost to replace the rack assembly. Very disappointed to learn this is a common problem. First appeared at approximately 30,000 miles.
power steering fluid leak
Steering wheel fluid leakage
Bought a used Mercedes 2003 E320 and when we took it in for its first checkup at 73,000 miles we were told it had a steering rack leak that would cost over $1,000 to repair/replace.
Fluid Leaking, High Pitched noise, poor steering performance.
The steering rack is leaking.
power steering rack and pinion was replaced 2 year later having the same problem.
Power steering leak
The P/L fluid level is low and noice.
steering rack has small leak and requires replacement.
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