Add hydraulic fluid to w222
Thread Starter
Junior Member
Joined: Mar 2018
Posts: 54
Likes: 5
ML 500
Add hydraulic fluid to w222
Hey guys, anybody have any experience adding hydraulic fluid to their w222? I checked my fluids and saw my fluid is below the threshold line (for when the vehicle is cold). Looking to add a liter or at least to the correct line.
My reservoir has the metal clip over the cover, do I open that up and add fluid where the filter is at or can I add where the dip stick is at? I saw videos on YouTube where they added to both of them (older models) but wanted to make sure on this model. Thanks!
PS. Also having trouble turning the cover open, any tips on opening it would be great.
My reservoir has the metal clip over the cover, do I open that up and add fluid where the filter is at or can I add where the dip stick is at? I saw videos on YouTube where they added to both of them (older models) but wanted to make sure on this model. Thanks!
PS. Also having trouble turning the cover open, any tips on opening it would be great.
Last edited by jayrawk; Dec 6, 2023 at 12:20 PM.
MBWorld Fanatic!
Joined: Jul 2013
Posts: 4,830
Likes: 772
From: Venice Florida
2018 S560
By Hydraulic fluid do you mean Brake Fluid or MBC Suspension Hydraulic fluid? I was thinking about checking my MBC Fluid soon, I think it's located under the drivers side front of the car under the hood and accessed by removing the plastic cover. I see no reason though as to why it would be low unless you have leaks in which case the leaks should be addressed.
Thread Starter
Junior Member
Joined: Mar 2018
Posts: 54
Likes: 5
ML 500
By Hydraulic fluid do you mean Brake Fluid or MBC Suspension Hydraulic fluid? I was thinking about checking my MBC Fluid soon, I think it's located under the drivers side front of the car under the hood and accessed by removing the plastic cover. I see no reason though as to why it would be low unless you have leaks in which case the leaks should be addressed.
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,611
Likes: 1,209
From: Phoenix
222 S-65
You got it right OP.
A ‘Mystery leak’ is often a nitrogen bomb dying a slow death. Most common is the one that threads into the pump. Easy replacement but thou shalt be sure the area around it is utterly spotless before replacing it. A can of flammable brake cleaner will do the trick. It will make for a dramatic noise when it happens. Don’t be alarmed... you are now armed with information so you know what to expect.
A ‘Mystery leak’ is often a nitrogen bomb dying a slow death. Most common is the one that threads into the pump. Easy replacement but thou shalt be sure the area around it is utterly spotless before replacing it. A can of flammable brake cleaner will do the trick. It will make for a dramatic noise when it happens. Don’t be alarmed... you are now armed with information so you know what to expect.
Thread Starter
Junior Member
Joined: Mar 2018
Posts: 54
Likes: 5
ML 500
You got it right OP.
A ‘Mystery leak’ is often a nitrogen bomb dying a slow death. Most common is the one that threads into the pump. Easy replacement but thou shalt be sure the area around it is utterly spotless before replacing it. A can of flammable brake cleaner will do the trick. It will make for a dramatic noise when it happens. Don’t be alarmed... you are now armed with information so you know what to expect.
A ‘Mystery leak’ is often a nitrogen bomb dying a slow death. Most common is the one that threads into the pump. Easy replacement but thou shalt be sure the area around it is utterly spotless before replacing it. A can of flammable brake cleaner will do the trick. It will make for a dramatic noise when it happens. Don’t be alarmed... you are now armed with information so you know what to expect.
