03'55AMG

I noticed today that my PS pump is literally almost out of fluid... There is no leaks and the dealer filled it up 2 years ago, Do these pumps eat up fluid? What fluid should I throw in here? Just any synthetic fluid? searched and found info on leaks and one "going nuclear", but nothing on fluid. What do you guys run?

GT-ER

Mine is the nuclear.

berti_00

Man you have no luck lol... make sure its full to the level it needs to be

desired_speeds

OEM MB PS fluid.

Critter

not checked your fluid in 2 years, what do you smoke besides your lights? anyways check your steering rack, it is probably leaking into the plastic belly pan under the car, the rack is the long piece with the two rods coming out one on each side that attaches to the wheels. There will be two hoses attached, also a point of possible leakage. There are plastic bellows which cover the tie rods, if no leakage is seen anywhere else, take a sharp awl and poke a hole in the bellows on either side at the bottom to see if the fluid is in the bellows. Good luck

novae500

Man time to ditch the car and get a newer one....PS fluid you need is Pentosin ch11 its green metal can. $24/liter

03'55AMG

will any fluid work?

Quadcammer

no, use the pentosin.

11s or chf202

oh, and the pump does not "eat" fluid. If its low, you have a leak.

berti_00

Id do a flush and while at it make sure you get a new resivore it comes with two new rubber seals and ur good to go

GT-ER

Two rubber seals? I've replaced two reservoirs in two cars and they have had only one seal.

03'55AMG

I noticed on another thread that the PS pump is almost universal on all Mercedes, with only the reservoir changes. Where can I get another one?

berti_00

i might be mistaken might be just the one that goes all the down on to were you hook your hose up.... could of sworn there were two

Quadcammer

only one seal.

Why are you replacing the reservoir? Its a piece of plastic. You can replace the seal if you think its leaking from there, otherwise there isn't much point.

berti_00

yah i searched it and saw one only... why its because its cheap and the tech at the dealer said if am not wrong it has some sort of i dont wana say sponge but something that collects dirt and such

03'55AMG

Exactly, I have heard there a little filters built in. So might as well replace it as maintenance

GT-ER

I've been told by a few people that the reservoir has a built in filter. One of those people is a guy I have always found very knowledgable when it comes to MB so I don't know.

03'55AMG

+1. I am not throwing names, but I can count on the Guy who told me anyday.. If he were wrong I would be shocked.

GT-ER

BTW- It DOES have a filter:

http://www.benzworld.org/forums/w163...reservoir.html

grane

Advance Auto Parts regularly stocks both Pentosin fluids at a favorable price. It is also used in the ABC system on cars that have that system. Why pay more?

novae500

That's where I got mine. Behind the counter. With new green fluid no more whine or noise. Fluid drained out was honey brown !!

Quadcammer

I looked through that thread. The reservoir in my car (same m113) does not have that screen.

chf 202 is backwards compatible to 11s. either is fine

GT-ER

I have to check mine. I plan on flushing my fluid and so I should be able to see it when empty.

Sir-Boost-a-Lot

iTrader: (1)

Not necessarily. That particular fluid evaporates over time, so if the levels haven't been checked in some time and you find it low with no leaks, this is likely what happened.

GT-ER

Where does it evaporate to? The system is pretty sealed.

Sir-Boost-a-Lot

iTrader: (1)

Probably the cap, but I haven't examined it. It's got to be vented somewhere to account for thermal expansion of the fluid. It will expand around 7% in volume from a cold morning to a spirited drive with a hot engine.