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'08 E63 Brake Fluid Change?

 
Old 02-19-2019, 08:19 PM
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2008 Mercedes-Benz E63 AMG
'08 E63 Brake Fluid Change?

Hi all,

So I've searched the forums a little bit and haven't come across a clear and direct answer to my questions. Please forgive me if I missed a post.
Soooo I have my 2008 E63, right? I was driving down the freeway when my driver's side rear tire partially shredded and a strip ended up severing the brake hose. Brake fluid got everywhere and my rotor caught fire momentarily (sucks). Anyway, I replaced the rotors, pads, hoses, and brake shoes on both sides, but now I'm trying to figure out whether or not I can perform a brake fluid flush without any pressurized tools or the STAR system I keep seeing everywhere.

On top of that, I was checking the bleed screw to see if fluid was making it to the caliper, and no fluid is coming out. I checked the hose and the fluid is there. I checked the screw to make sure it wasn't clogged and it's not. Can I please get some clarification on what could be interrupting the flow of brake fluid to the caliper? Also, the pressurized tools and STAR system question too..

Thanks in advance for any help. I've read some stuff about a proportioning valve, but most of what I've read says it's usually for cars with disc brakes in front and drums in back soo I dunno. I feel like I'm ranting aimlessly so I'll summarize quickly-
  • Can I complete a brake fluid change without pressurized tools?
  • Can I complete a brake fluid change without STAR?
  • What could be interrupting flow of brake fluid to caliper?
Pictures upon request!
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Old 02-21-2019, 11:15 AM
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Yes, you can changed/flush your brake fluid without using Star. To clarify Star Diagnostic is used on the 03-06 E55, utilizes brake by wire (SBC) Sensotronic Brake Control, which pressurizes the system to 3000 psi.
But our cars have a regular hydraulic brake system, just have someone pump the brakes while you loosen the bleeder valve on each caliper. Remember that the fronts have two bleeder valves, one in the side pistons and one for the outside piston. The rear calipers just have one belled valve. I can't answer as to what might be interrupting your flow of fluid to the caliper. I'm having my brake flushed in the next few months, as I do this every two years.
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Old 02-21-2019, 06:48 PM
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Originally Posted by Yuille36 View Post
Yes, you can changed/flush your brake fluid without using Star. To clarify Star Diagnostic is used on the 03-06 E55, utilizes brake by wire (SBC) Sensotronic Brake Control, which pressurizes the system to 3000 psi.
But our cars have a regular hydraulic brake system, just have someone pump the brakes while you loosen the bleeder valve on each caliper. Remember that the fronts have two bleeder valves, one in the side pistons and one for the outside piston. The rear calipers just have one belled valve. I can't answer as to what might be interrupting your flow of fluid to the caliper. I'm having my brake flushed in the next few months, as I do this every two years.
That is great news. I really appreciate the response man, thank you. I'll keep researching the fluid issue, but if anyone else has any advice, I'm open to suggestions and ideas. I can't wait to get this thing running again

Last edited by easeLDK; 04-23-2019 at 12:05 PM.
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Old 04-19-2019, 07:29 PM
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Any DOT4 will do? It's hard to find MB genuine brake fluid at local stores.
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Old 04-19-2019, 07:47 PM
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Originally Posted by dustinN View Post
Any DOT4 will do? It's hard to find MB genuine brake fluid at local stores.
Yeah, my only issue now is the rear brakes don't get pressure. My front brakes are the only ones operating.
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Old 04-20-2019, 02:22 PM
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Originally Posted by easeLDK View Post
Yeah, my only issue now is the rear brakes don't get pressure. My front brakes are the only ones operating.
Make the most of this issue: go rip some mean standing burnouts
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Old 04-22-2019, 09:03 AM
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Originally Posted by easeLDK View Post
Yeah, my only issue now is the rear brakes don't get pressure. My front brakes are the only ones operating.
This could be simply air in the rear calipers, brake lines or stuck caliper pistons. The rear pistons can be removed and maintenance performed on them, but you will require new piston o-rings.
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Old 04-22-2019, 02:09 PM
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Brake Fluid is hydroscopic meaning it absorbs moisture from the environment. If your brake fluid isn't flushed every two years, you could have collected moisture in your rear brake lines, or rear calipers.
And if so, then the moisture will start to rust the surface of your calipers pistons, thereby not allowing them to move. That could explain why your front calipers is going all the work, and not the rears.
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Old 04-22-2019, 04:13 PM
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if for any reason you had air in the area of your brake calipers...if its been a VERY long time since the fluid was replaced, you very well could have corrosion preventing/limiting movement to your rear caliper pistons. I'd proceed with a full bleed before making that determination.
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Old 04-23-2019, 08:50 AM
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Originally Posted by hachiroku View Post
I'd proceed with a full bleed before making that determination.
Good call
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Old 04-23-2019, 09:42 AM
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Originally Posted by N_Rob View Post
Make the most of this issue: go rip some mean standing burnouts
Definitely considered that!
Originally Posted by Yuille36 View Post
This could be simply air in the rear calipers, brake lines or stuck caliper pistons. The rear pistons can be removed and maintenance performed on them, but you will require new piston o-rings.
I've considered rebuilding the calipers but I don't know where I'd find replacement pistons and rings. I also want to have them sandblasted and repainted because one took major cosmetic damage.
Originally Posted by hachiroku View Post
if for any reason you had air in the area of your brake calipers...if its been a VERY long time since the fluid was replaced, you very well could have corrosion preventing/limiting movement to your rear caliper pistons. I'd proceed with a full bleed before making that determination.
I thought it might be air as I've heard that some air can stay in the line for a while but I've done a full bleed and nada. The caliper is getting fluid, but there is no pressure. I've heard of a combination valve or proportioning valve that will stop pressure to the front or back, but I can't seem to find any info on it here.
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Old 04-23-2019, 09:57 AM
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As far as the pistons and rings go, I would definitely contact Brembo below, as they are the OEM supplier of our rotors and calipers.
I personally don't think that Mercedes would have these parts, but they would sell you an entire caliper.

Brembo North America Inc., Homer, MI (517) 568-4398 Open ⋅ Closes 4PM
Brembo North America Plymouth, MI (734) 468-2100 Open ⋅ Closes 5PM
Brembo North America Mooresville, NC (704) 799-0530
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Old 04-23-2019, 11:39 AM
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if you're able to bleed the rear calipers, then you are getting fluid to your rear calipers.

if you pull your brake pad pins you'll be able to compress your pistons like a normal brake pad change. if you are unable to then you possibly have a seized caliper piston. i'd doubt that all 4 rear pistons are seized. the calipers on our cars are very high quality brembo brakes.

if you've done all of this and are still lost, i'd recommend you bring your car to a certified mercedes repair shop as quite honestly these steps will identify your issue if there is one.
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Old 04-23-2019, 12:39 PM
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You can get the caliper seals and pistons from Racing Brake. In the Evo world a lot of people use the racing brake components without any problems. If I recall correctly Brembo isn't selling the rebuild kit anymore or it was hard to locate? I don't remember which one it was. See link below:


https://www.racingbrake.com/category-s/7067.htm


Also Centric sells fully rebuilt and painted calipers. I looked on rockauto and they only have the rears. A friend of mine bought a full set of Centric rebuilt calipers for his Evo and they are fine 2 years later. Paint still looks good too. I don't recall what parts where used for the rebuild from Centric but that make seals and pistons for other makes so I would guess Centric parts.


https://www.apcautotech.com/automoti...raking-systems
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