w220 s55 brakes not working after brake oil change
Thread Starter
Member
Joined: Mar 2019
Posts: 147
Likes: 28
w220 S55 AMG 2004
[SOLVED] w220 s55 brakes not working after brake oil change
3 days ago i decided to flush the brake fluid so i got my self a mercedes dot4 brake oil and went to the workshop asking them to flush it ... only after 30 minutes the mechanic came and said you brake doesn't work ...!!!
i checked and indeed it is not working ,, the pedal sink to the floor with no brakes. after asking what they done , they applied vacuum to the brake calipers to such the oil and removed the oil from the oil tank above the master cylinder then added new oil there then started the car and beaded the system with no luck ..
we spend the next 5 hours bleeding the system from air with no luck ... the finally said the master cylinder could be dead due to the fact that we kept pressing the brakes for too long far so many times.
so i went ahead and got my self a second hand master cylinder to fix my issue but after installing it , bleeding the master cylinder then the ABS two in pipes, 4 out pipes and the 4 calipers the problem remained the same ..!!!!
so far i did the following :
- bleeding the system ( didnt work )
- changed the master cylinder and bleed again ( didn't work)
- remove the 4 nipples from the calipers and let it seep oil for 2 hours then install them again and try ( didn't work)
- bleed the EBS unit and the master cylinder then bleed the whale system again ( didn't work )
i checked all the system with DAS no errors at all in the ESP system ...
i really don't know what else to do ... i really hope that someone is reading this and thinking i know what could be the problem.
any advice is highly appreciated
i checked and indeed it is not working ,, the pedal sink to the floor with no brakes. after asking what they done , they applied vacuum to the brake calipers to such the oil and removed the oil from the oil tank above the master cylinder then added new oil there then started the car and beaded the system with no luck ..
we spend the next 5 hours bleeding the system from air with no luck ... the finally said the master cylinder could be dead due to the fact that we kept pressing the brakes for too long far so many times.
so i went ahead and got my self a second hand master cylinder to fix my issue but after installing it , bleeding the master cylinder then the ABS two in pipes, 4 out pipes and the 4 calipers the problem remained the same ..!!!!
so far i did the following :
- bleeding the system ( didnt work )
- changed the master cylinder and bleed again ( didn't work)
- remove the 4 nipples from the calipers and let it seep oil for 2 hours then install them again and try ( didn't work)
- bleed the EBS unit and the master cylinder then bleed the whale system again ( didn't work )
i checked all the system with DAS no errors at all in the ESP system ...
i really don't know what else to do ... i really hope that someone is reading this and thinking i know what could be the problem.
any advice is highly appreciated
Last edited by ls1_mast; Sep 13, 2023 at 03:22 AM.
Thread Starter
Member
Joined: Mar 2019
Posts: 147
Likes: 28
w220 S55 AMG 2004
here is the update , we finally were able to figure it out .... the system had TOO MUCH air in it !!!!!!!
i had to blead the system manually by loosing the calipers nozzles and let it drop oil while adding oil at the top for 13 hours ( literally) in not execrating..!! then it started to have some brake , then blead the rest of the system again then everything came back to normal.
i had to blead the system manually by loosing the calipers nozzles and let it drop oil while adding oil at the top for 13 hours ( literally) in not execrating..!! then it started to have some brake , then blead the rest of the system again then everything came back to normal.
