"Whirring" Sound
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,907
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From: Bay Area
E500 Sport
"Whirring" Sound
Hard to describe the sound. Not a grinding sound. More of a "whir". It happens only when the car is cold AND I make a 3/4-to-full lock turn (e.g. I'm backing out of the driveway in the morning, turning onto the street). The sound comes while I'm turning the wheel. Once my car is straight again, the sound's gone.
Also, once the car's warmed up, and I make those 3/4 turns, there's no sound.
Any thoughts?
Also, once the car's warmed up, and I make those 3/4 turns, there's no sound.
Any thoughts?
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,017
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From: Ft. Lauderdale Area, USA
2015 ML 350
Hard to describe the sound. Not a grinding sound. More of a "whir". It happens only when the car is cold AND I make a 3/4-to-full lock turn (e.g. I'm backing out of the driveway in the morning, turning onto the street). The sound comes while I'm turning the wheel. Once my car is straight again, the sound's gone.
Also, once the car's warmed up, and I make those 3/4 turns, there's no sound.
Any thoughts?
Also, once the car's warmed up, and I make those 3/4 turns, there's no sound.
Any thoughts?
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,907
Likes: 2
From: Bay Area
E500 Sport
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,017
Likes: 16
From: Ft. Lauderdale Area, USA
2015 ML 350
Under the hood. Yeah, its a simple DIY job, but let them top it off, they won't overfill it & they'll use the right stuff. Tell them you want to wait for it. I told them its a closed system (supposedly) and where'd it go? They said not to worry. So I don't.
Super Member
Joined: Apr 2004
Posts: 625
Likes: 82
From: Germantown, MD
'07 GL450
Had a similar problem a while ago (a little over a year). It progressively got worse. Took her in for service and they ended up replacing something associated with the steering. Recently I started noticing it again (much more subtle though) when backing in to parking spaces and wheel at full lock.
45k miles, I'll have them look her over before the warranty expires.
GL.
45k miles, I'll have them look her over before the warranty expires.
GL.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,907
Likes: 2
From: Bay Area
E500 Sport
Had a similar problem a while ago (a little over a year). It progressively got worse. Took her in for service and they ended up replacing something associated with the steering. Recently I started noticing it again (much more subtle though) when backing in to parking spaces and wheel at full lock.
45k miles, I'll have them look her over before the warranty expires.
GL.
45k miles, I'll have them look her over before the warranty expires.
GL.
Interesting. sounds like the same symptoms. I emailed my service advisor to see what his diagnosis is as well. How was your power steering fluid-level when you took your car in the first time? Was it low?
Super Member
Joined: Apr 2004
Posts: 625
Likes: 82
From: Germantown, MD
'07 GL450
Don't know.. didn't ask. All I was interested in was the problem disappearing, and it did.
I'll review my service logs this evening and provide more details about what was fixed/replaced.
I'll review my service logs this evening and provide more details about what was fixed/replaced.
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Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,907
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From: Bay Area
E500 Sport
LOL...funny response! Sounds like my way of thinking sometimes. Please let me know what you find out. Thanks!
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Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,636
From: North Scottsdale, AZ
'71 Pinto
Hard to describe the sound. Not a grinding sound. More of a "whir". It happens only when the car is cold AND I make a 3/4-to-full lock turn (e.g. I'm backing out of the driveway in the morning, turning onto the street). The sound comes while I'm turning the wheel. Once my car is straight again, the sound's gone. Also, once the car's warmed up, and I make those 3/4 turns, there's no sound. Any thoughts?
Many complaints about noise coming from the steering system, particularly during the colder seasons, are caused by the fluid level in the power steering pump reservoir being too low, without the system having a leak. Small shortages are sufficient to cause the pump to take in air or foaming fluid, which then produces noises. It is recommended to always fill the fluid level to “Maximum” fort the corresponding temperature, particularly during winter.
Power steering fluid – Pentosin CHF 11S (part # BQ 1320001)
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,907
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From: Bay Area
E500 Sport
Mention P-B-46.30/22a APR05 – Noises from the power steering pump. Fluid level, noise in adjacent components, clearance between lines and components, any possible leakage, and power steering gear will be inspected. Also reservoir and filter will be replaced if needed.
Many complaints about noise coming from the steering system, particularly during the colder seasons, are caused by the fluid level in the power steering pump reservoir being too low, without the system having a leak. Small shortages are sufficient to cause the pump to take in air or foaming fluid, which then produces noises. It is recommended to always fill the fluid level to “Maximum” fort the corresponding temperature, particularly during winter.
Power steering fluid – Pentosin CHF 11S (part # BQ 1320001)
Many complaints about noise coming from the steering system, particularly during the colder seasons, are caused by the fluid level in the power steering pump reservoir being too low, without the system having a leak. Small shortages are sufficient to cause the pump to take in air or foaming fluid, which then produces noises. It is recommended to always fill the fluid level to “Maximum” fort the corresponding temperature, particularly during winter.
Power steering fluid – Pentosin CHF 11S (part # BQ 1320001)
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,907
Likes: 2
From: Bay Area
E500 Sport
No problem! Hope you enjoyed yourself. I know we're all busy.
Super Member
Joined: Apr 2004
Posts: 625
Likes: 82
From: Germantown, MD
'07 GL450
Ok.
Here are the details from my service ticket, dated 18 October 2005:
Hope this helps.
Here are the details from my service ticket, dated 18 October 2005:
E C/S P/S NOISY W/TURNING. WORSE COLD.
941015 VEHICLE DRIVE TRAIN NOISE(S), LOCATE
1 211-460-32-00 STEERING BOX
1 055-997-76-40 SEAL RING
2 027-997-95-48 SEAL RING
1 Q-1-46-0001 POWER STEERI
2 BC BRK-CLEAN
463005 POWER STEERING OPERATION, CHECK AND INSPECT FOR LEAK(S)
463610 POWER STEERING GEAR BOX/STEERING RACK, REPL. (SEE ALSO 46-3576)
406560 WHEEL ALIGNMENT - FRONT & REAR, CHECK AND ADJUST (SEE ALSO 40-6716/6717) - ADDL. WORK WHEN REQ. (SEE ALSO
24838 RACK AND PINION MAKING A LOUD NOISE AND LEAKING, WR CHECK NOISE ON TURNS, LOCATE NOISE, CHECK P/S FLUID, LOW, TOP FLUID OFF AND RECHECK, FOUND RACK & PINION LEAKING, R+R AND REPLACE RACK AND PINION ASSY, BLEED SYSTEM AND RECHECK OK PLSPYTCH260^ &&&&&&&&&&&&&&&&& TECH 236 PERFORMED 4 WHEEL ALIGNMENT/ PAY 236
941015 VEHICLE DRIVE TRAIN NOISE(S), LOCATE
1 211-460-32-00 STEERING BOX
1 055-997-76-40 SEAL RING
2 027-997-95-48 SEAL RING
1 Q-1-46-0001 POWER STEERI
2 BC BRK-CLEAN
463005 POWER STEERING OPERATION, CHECK AND INSPECT FOR LEAK(S)
463610 POWER STEERING GEAR BOX/STEERING RACK, REPL. (SEE ALSO 46-3576)
406560 WHEEL ALIGNMENT - FRONT & REAR, CHECK AND ADJUST (SEE ALSO 40-6716/6717) - ADDL. WORK WHEN REQ. (SEE ALSO
24838 RACK AND PINION MAKING A LOUD NOISE AND LEAKING, WR CHECK NOISE ON TURNS, LOCATE NOISE, CHECK P/S FLUID, LOW, TOP FLUID OFF AND RECHECK, FOUND RACK & PINION LEAKING, R+R AND REPLACE RACK AND PINION ASSY, BLEED SYSTEM AND RECHECK OK PLSPYTCH260^ &&&&&&&&&&&&&&&&& TECH 236 PERFORMED 4 WHEEL ALIGNMENT/ PAY 236
Hope this helps.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,907
Likes: 2
From: Bay Area
E500 Sport
Update
I finally got around to visiting my dealer. They topped off the power-steering fluid. The sound is gone...it's been a week so far. Thanks for your help guys
