W211 Power steering flush DIY - Mercedes-Benz Forum
 
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post #1 of 1 (permalink) Old 10-20-2013, 11:02 AM Thread Starter
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Date registered: Apr 2009
Vehicle: E320 Bluetec S420
Location: Oklahoma
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W211 E320 Bluetec Power steering flush DIY

Alright here we go again, so the dealer handed me the wrong fluid and i found out that the Q1460001 power steering oil FE was actually made for the BLUE-EFFICIENCY line up hence the FE acronym at the end of the bottle. Anyways i bought the correct fluid its Pentosin CHF 11S fluid is green in color and it doesn't produce a pungent smell as to the Q1460001 did.

DISCLAIMER I M NOT RESPONSIBLE FOR ANY DAMAGES OR INJURIES THAT MAY OCCUR WHEN FOLLOWING THIS GUIDE, DO IT AT YOUR OWN RISK YOU"VE BEEN WARNED!


This is done on a 08 E320 Bluetec Anyway lets get started


Tools
Ratchet
8mm Socket (to remove the bottom cover)
Phillips Screwdriver
2x Cans of Pentosin CHF 11S


1st pic lift the car with, place the jack in the middle rubber brick looking thing and lift from there and place your jack stand, Dont want to loose a limb or your life. And Remove the front bottom cover use a 8mm socket to remove the 8 screws.

2nd pic Remove the engine cover, just lift it up.

3rd pic The power steering cooler line is located on the left of the car, (SEE RED BOX)

4th pic Gives you a closer view of where the power steering cooler located. (SEE RED BOX)

5th pic Direction of the power steering fluid flow. Bottom hose is from the power rack and pinion to the cooler and the Top hose is from the cooler back to the power steering reservoir.

6th pic Remove the TOP HOSE!! Use the Phillips screwdriver to remove the clamp be sure you put a large catch pan under of the cooler line that your removing, the power steering reservoir content is going come gushing out of the line when you remove it be prepared. You may have to give it a good tug to remove the line but be careful not to break the power steering cooler line

7th pic next grab a clear hose at your local hardware store, the my size is 3/8 in, though is bigger then the cooler outlet it works just fine it didnt not leak on me.

8th pic stick the clear line in place of the top cooler line that you removed, besure you push the clear line as far back of the cooler line so it doesn't come out and shot fluid all over the place, no secure is needed for the clear line.

9th pic Route the clear line to a catch container.

<<<CAUTION>>> MAKE SURE THE CLEAR LINE IS NOT KINKED, OR FLUID WILL GO EVERYWHERE, IF YOU CLAMPED YOUR LINE ON THE OIL COOLER, DAMAGE TO THE RACK AND PINION OR THE CLEAR LINE WILL EXPLODE MAKING A EVEN BIGGER MESS!!!

10th pic is the line from the powersteering cooler to the reservoir, the line is long enough to bend it up wards to prevent fluid from gushing out of the reservoir when you add fluids to it.

OK no more pic just instruction

11 Put your key in the car and turn to ACC DO NOT START THE ENGINE, you just want the steering to be unlocked,

12 Turn the steering from Left to Right lock to lock 5 times this will push out the old fluid from the rack and pinion to the cooler and out to the drain container. You will hear grugling in the power steering fluid reservoir this is normal, continue turning till there no fluid coming out.

13 Just refill the power steering reservoir with PENTOSIN CHF 11S to full and turn the steering lock to lock 5x time or till all the fluid is out. This will flush out the all the old oil from the reservoir, pump, rack and pinion and the power steering cooler.

14 Repeat step 13, doing 2nd flush will rid of all of the remaining old fluid in the system and its now flush with clean fluid.

15 Remove the clear drain line and reattach your cooler line to reservoir back, be sure to push the line in snugly and attach the clamp do not over tighten or risk the chance of damaging the aluminum cooler line.

16, now add the the refill the reservoir to the max line on of the dipstick of the power steering cap, and turn the steering lock to lock 5x, gurgling sound will be present and its sign that the fluid is low, check and refill the reservoir till to the cold max line of the power steering cap dip stick, continue to turn lock to lock 5x this will remove remaining air in the rack & pinion and power steering cooler line, check level and add as needed.

17 Next start up the engine, and turn lock to lock 5x times to remove all of the air, CHECK FLUID level and add till your at the max cold line.

18 take for test drive and check for leaks and check the level, id leave the bottom cover off for a 1-2 days to check for any leaks.

19 Wash off the any oil spills with warm water.

20 Reattach bottom cover after you verify that there's no leaks.
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1984 300SD 292K miles HEAD ON COLLISION 9/13/11
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1987 300SDL 204K miles
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Last edited by Actros617; 10-20-2013 at 12:15 PM.
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