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Can I just add power steering fluid? I noticed a whine when turning and I looked and there is barely any fluid, can I just add it or do I have to siphon the little that’s in there and what kind of fluid do you recommend? Thank you
I'm guessing your fluid is in poor condition. I would start by removing (a turkey baster is the cheapest tool to do this) as much fluid from the cannister as you can, and then add new fluid. See if the whine is gone or ar least improved. If improved, do a complete changeout of the fluid. Make sure you yse the correct fluid.
To answer the question yes just add fluid. With engine off turn steering wheel side to side several times seeing if the level goes down. Add fluid as needed. Then start the car and see if the level goes down, add fluid as needed. then turn steering wheel side to side again and watch fluid level.
Fluid I use Pentosin CHF 11S which meets the MB spec and is commonly available.
To answer the question yes just add fluid. With engine off turn steering wheel side to side several times seeing if the level goes down. Add fluid as needed. Then start the car and see if the level goes down, add fluid as needed. then turn steering wheel side to side again and watch fluid level.
Fluid I use Pentosin CHF 11S which meets the MB spec and is commonly available.
Why would you turn wheel side to side with engine off?
I would never try doing that with hydraulic power steering system.
For the fluid it is best to go to MB dealer and get the correct fluid from them. It may cost a buck or two more than some other stuff but at least you can stop guessing what to use. It is very small reservoir do it should not be an issue to get it from the dealer.
My reasoning is OP states barely any fluid in the reservoir. The most likely cause is there is a leak somewhere, leaking or seeping. May be air in the system if the level is so low. So to add more power steering fluid I would follow the MB procedures for filling and bleeding the system. I'll post it below.
I always and only use fluids that meet the MB specs. The fluids I use have the MB spec printed right on them that takes the guess work out. For power steering fluid the Pentosin CHF 11S is even listed in the manual. I recently picked up a container of the Pentosin for $20 on sale at a local store. I just looked and my dealer has the MB fluid for $40. I see no reason to spend more if it meets spec. The only Genuine MB fluid I buy is the Dot4+ brake fluid since I cant find a cheaper brand, I can find it on eBay for less than $20.
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