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Power steering conundrum

4K views 12 replies 7 participants last post by  Bonky28 
#1 ·
Anyone out there in Mercedes land suffered with heavy power steering on initial start up, it's cooler here than of late but don't think that should effect the operation of the pump. The problem disappeared after stopping and restart, just looking for suggestions.
 
#6 · (Edited)
My SLK 200 is heavy too; PS oil level is fine. Are there any other adjustments?

In another, connected, thread, 'Sneaky Pete' wrote:
But I looked at your datacard and noticed it is lacking SPS (Speedsensitive Power Steering, option 213). The symptoms you describe are typical for what you experience when you get to drive a R171 without it. Mine's lacking it too and I immediately noticed it. Both my previous SLK's had SPS and I experienced the same symptoms you describe when I drove away with my current one that is lacking it. Might be you have to live with it. Retrofit SPS is pretty difficult I believe, if not virtually impossible. Just a heads-up, but you can give the adjustments always a try. If not, look at the bright side, free workout!!
 
#12 ·
I will be very careful with that as any air in the system will be very hard to bleed.
Just do what I did on my old slk.

https://www.slkworld.com/slk-r171-class-diy/155170-diy-power-steering-wheel-fluid-change.html



from wis
Fill expansion reservoir (power steering) (1) 
with MB steering gear oil Do not start the engine!
If the engine is started, there is a risk of air
entering the hydraulic steering, which is then
extremely difficult to remove.
 Fill the expansion reservoir (power
steering) (1) up to approx. 10 mm below the
upper edge of the reservoir with MB steering
gear oil.
Refill with MB-steering gear oil continuously
until the oil level remains constant.

Bleeding
6 Turn steering wheel from steering stop to 
steering stop Do not start the engine!
If the engine is started, there is a risk of air
entering the hydraulic steering, which is then
extremely difficult to remove.
 Turn the steering wheel slowly from
steering stop to steering stop until no more
bubbles can be found in the expansion
reservoir (power steering) (1).
Repeat turning the steering from stop to stop
several times (up to 30 times). During this
process, MB steering gear oil must be poured
into the expansion reservoir (power steering)
(1) by a second person

Start engine without moving the steering  Allow engine to run for Approx.. 1 min. at
idle speed.
During this process, a second person must
observe the oil level in the expansion reservoir
(power steering) (1) and add MB steering gear
oil as required.
8 Turn steering wheel from steering stop to  With the engine running, turn the steering
steering stop wheel slowly several times from steering stop
to steering stop, occasionally adding MB
steering gear oil to the expansion reservoir
(power steering) (1).
Repeat the procedure until the oil level in the
expansion reservoir (power steering) (1)
remains constant and bubbles are no longer
visible.
 Check
9 Check oil level in expansion reservoir (power
steering) (
 
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