ml320 power steering very light after servicing - PeachParts Mercedes-Benz Forum

Devil Dog · #1 11-06-2011, 11:23 PM

Well I serviced the power steering because of a leak at the reservoir o ring. Followed instructions by jacking vehicle, Mercedes oil,and 30 plus complete lock to lock turns.I used a suction tube to remove bubbles and kept filling a littleat a time a little messy but now it's so smooth to turn. I mean with a finger did I do something wrong because it seems really easy to turn.I know this might sound strange asking this but it did seem harder to turn or more resistance shall I say to turn the wheel.

mbdoc · #2 11-07-2011, 11:38 AM

Maybe the steering is NOW working as it was designed to work?

Devil Dog · #3 11-07-2011, 03:12 PM

Thanks MB Doc just wasn't sure you know very little resistance kinda to good to be true.If that is how it is supposed work I did bleed it really good sucking out the air bubbles and discolored oil.Just wanted to make sure thanks MB DOC

mbdoc · #4 11-08-2011, 08:35 AM

speed sensitive steering is designed to be very easy to turn at low speeds & then get "stiffer" at higher speeds for a better road feel.

sunedog · #5 11-11-2011, 04:39 PM

Quote:

Originally Posted by Devil Dog

Well I serviced the power steering because of a leak at the reservoir o ring. Followed instructions by jacking vehicle, Mercedes oil,and 30 plus complete lock to lock turns.I used a suction tube to remove bubbles and kept filling a littleat a time a little messy but now it's so smooth to turn. I mean with a finger did I do something wrong because it seems really easy to turn.I know this might sound strange asking this but it did seem harder to turn or more resistance shall I say to turn the wheel.

I have a 99 ML 320 with 270,000 miles and a power steering leak. Even though I had the the pump and reservoir replaced at 230,000 miles I have to top it off every couple of weeks.

The steering never seems light enough to turn the wheel with a single finger, even at idle or low speed. I suspect there is air in the circuit. Where did you find the purging instructions you mention above? Can you describe the purging procedure in more detail or point me to a resource?