W211 SBC Dissection

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My car was throwing an error code that the SBC accumultor was not building enough pressure. This results in a nice red stop sign on your gauge cluster, telling you not to drive the car. It won't even shift into gear if this warning comes up when you start the car. The brakes can fail without warning, at any time (this happened to me, driving with my family). Sometimes the warning light can come on while you're driving, which results in losing the majority of your braking ability. I had the accumulator replaced with a brand new unit, and that has fixed the issue. What do you do when you have a broken accumulator and a lathe? Cut it open to see what's inside!

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22 ноя 2016

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Комментарии : 16

@donegal2010able 2 года назад

The walls of the accumulator are thicker than I imagined, what a wonderfully disastrous technology the sbc is, it's stops the magically when it works and when is doesn't well the last thing you'll need is a new sbc, it happened to a guy I know he used the foot parking brake and down shifting before he finally rammed into the car in front, my W211 is a automatic needs a new sbc and new brake lines front to back, loved the car won't sell it won't drive it and damn sure I won't be getting it repaired not worth the money. Pity she's a beast and beautiful. Thanks for the video now I know.

@GNXClone 4 года назад

An accumulator "stores" the pressure produced by the SBC pump. It's like a hydraulic version of a capacitor. The ABC hydraulic suspension also has accumulators which do the same and which also go bad with age. The backside of the bladder is filled with high pressure nitrogen. Eventually the rubber bladder fails and allows the nitrogen to escape. These should be considered consumables much like brake pads and rotors. It's just that they don't need replacing as often as brakes. I have new accumulators for my ABC sitting on the shelf, ready for when each eventually fails. Looks like I should get one for my SBC as well!

@rafacbr9 2 года назад

good info that the backside of the bladder is filled with high pressure nitrogen. By the way, my car shows pressure 80 when working. Maybe is a little low :-(

@olamabambi4193 Год назад

Excellent video.

@kld5140 2 года назад

Thank you so much

@gramurspel 5 лет назад

It looks like an High Pressure Citroen Hydraulik suspension part. In the Citroen System are green Spheres that contains a thick rubber sphere inside and Outerside there is N gas as the High Pressure counterpart to the Hydraulik Oil. This Sphere looks identical to the Citroen part. There is no Pressure in the Sphere in the Video. The Pressure goes thru tiney holes in the Rubber Bladder.

@slinkoslink278 3 года назад

hello, i have a problem with my sbc, i have the code c235c, is that i can change the sbc with another which does not have the same reference? thanks for the reply.

@tripwalking 3 года назад

Sorry, I'm not the guy to be asking... I do some of the work on my own cars but I'm not qualified to give you information like that. Thanks for watching though!