Help me with a power steering leak in my W210 - Page 2 - PeachParts Mercedes-Benz Forum

apb · #16 11-04-2007, 06:43 PM

What size torx socket is needed? Is is E20 or something even larger?

k_alavi · #17 10-24-2010, 02:20 AM

Thank you fo the write ups. It was very helpful.

I fixed my daughter's 1997 E320 last Sunday. I had already bought the power steering oil the day before from the MB dealer when it was open. I verified that the problem was a failed O ring at the steering column on Sunday.

I was determined to fix the problem on that Sunday as my daughter needed the car on Monday. Dealer was closed on Sunday for parts. I went to the local Auto Parts store, but no luck. I went to Lowes and was able to find the O rings very close or even exact to the size I needed.

You need 4 O rings total to change all of them while you are at it. They were very cheap at Lowes. about $1.20 for all four. Two in each package.

Look in the plumbing department area and look for the brand Brass Craft with part number 0542. O ring size that I bought is 1-1/4" I.D. (1-7/16" O.D.) x 3/32" wall.

You need an E14 external torx socket for the job.

There is usually a lot of crud and oily mud in there. Make sure you clean everything up before you reinstall for a tight fit and to make sure it will not leak.

Be patient as this DYI needs some finess and make sure you change all 4 O rings.

amani356 · #18 06-25-2012, 05:55 PM

Quote:

Originally Posted by cudaspaz

I've done tons of those O-ring repairs at the dealership, as it is a very common problem.

Not fun to get the bolts lined up going back in, but take your time and you should be fine, but you should run the car and turn the wheel stop to stop and keep checking your fluid until you get it topped off right.

Sometimes it takes quite a few miles to get all the air out of the system, but get the level good with no foam first in your driveway.

Some vehicles require that you drop the rack down for clearance to get the bolts out to replace those O-rings, and I can't remember if your 420 has enough clearance to do it.

I would get the O-rings from the dealership since they are familiar with the problem.

I'm aware this post is over 5 years old but its worth a shot. The EPC list 4 o-rings that are associated with the steering knuckle. I assume 2 for each side? The leak, I think, is coming from the driver's side because I've already replaced the shaft seal in pump. What are the tightening torque values? Yours or anyone else's valuable response is greatly appreciated.