Breaks not working - SBC Pump failure (Part and Labor Covered by MB)
Reading the failures on this forum - it is a miracle, that no one reported a accident, and that all were able to bring the car to a stop, albeit with very little braking power....
Out of curiosity, what happens when a conventional braking system equipped car has brake failure? Is the braking power the same, somewhat mitigated, or is it just as bad as the SBC system - I can't imagine the latter?
If power assist goes on a conventional system you have to stand on the brakes to get the system to work at all. I have not had SBC fail but forum members on here have said it is worse than that, YMMV.
Out of nowhere red message comes up saying "reduced braking pressure" followed by "increased braking effort" finished off with

Now as I go to the car and tap the brakes, the SBC unit under the hood just makes a noise for about 2 minutes then stops.
The failure of this unit is inevitable. Either sell it now or wait for it. It doesn't pick when its going to happen either. Luckily I am within the 10-year warranty replacement, so I will be flatbedding it to the dealer tomorrow.
Are you 100% sure about this???? Any idea how many actuations, and can this info. be obtained from the dealer once the car is hooked up to STAR?
I do not think this is the case for me however, when that happens you get a FSS display along something of the lines of "Brakes - Visit Workshop" mine just completely died along with the backup system... Wierd thing is it will make a noise for about 2 mins if I try and hit the brakes. Sounds like its trying to activate but it cant.
Last edited by Dexion; Aug 8, 2011 at 11:47 PM.
The Best of Mercedes & AMG
However if you want the reasons there are way too many failures to list but just a few.
Airmatic compressor failure, rear air springs, engine mounts, ball joints, how water valve, ac hoses, and the list goes on and on.
Last edited by Dexion; Aug 10, 2011 at 10:56 AM.
The brake system functions amazingly, I will say that.
Got the Brake-visit workshop last few days: (NOT the red warning to stop driving)
1. is there a code that would indicate it is sbc pump/issue related for sure? and with that guarantee a dealer would warranty it?
2. Can I bring in the car and just state I want the sbc system updated now (or at anytime) as it was a defective system that has been documented? I would think so, as if I don't get updated it is only a matter of time before my brakes cut out at any speed.
3. Should I be scared?
Car still drives fine just that message pops up on every startup.
Ps. I may just drive into the local dealer and ask to inspect my sbc system, hopefully that would be no charge? LOL
My car is a 2003(January) e500 with less than 69000 mi. Without previous warning on any issue, I got the Red visit workshop warning and I immediately lost about 80-90% of braking power in that cool morning. I turned off and on the ignition 2-3 more times then the RED indicator went away. I did not want to take a chance driving it around. 2 days later I took it in to a dealer that I use for the last 20 years- 18 mi away (no problem driving it there). The dealer said its the SBC pump that needed replacing. (I heard that it has a, forgive my German not French, "stupid" useful life of 300,000 depressions and I confirmed this with the dealer.). I also heard it has an extended warranty of 10 years but mine is 9 months over.
The bill would be $2400 to replace the SBC. So I called the MBZ head office back east to see if they can help me out. The mail operator, not patient nor friendly, took my call and said it will be handled by a case manager. They would call me back with a decision. Days went by and no one called me back. So my second call to them revealed that my case was sitting in their computer and no one was working on it. TIME WASTED. This time they got me a case manager on the phone and work on it right a way when I mentioned to her that this is my 6 MBZ in 20 years (4 in the last 6 years alone and the last purchase was only 2 month ago in September). 2 days later the dealer called and offered to pay for the replacement part(SBC pump) but wanted me to help pay for labor cost. To cut the prolong hassle, We finally agreed on <$600 out of my pocket = 1/4 of $2400 or so.
The recall that people think or mentioned online is not a true mandatory recall. Dealer and MBZ USA said if you have a problem, then they will fix it within 10 years...
I am shock that this brake safety issue is not a total mandatory recall by MBZ USA, especially if the SBC is designed to cut off the braking capability(without warning) when it reaches 300,000 brake depressions. I am sure MBZ knew of this serious design flaw. That is why I was told that this particular brake system was in use for only 3-4 years in the US. - until about 2005-2006 or so. Hmm!! if it is a good system, why discontinued.
Hope this helps when anyone needs to deal with MBZ USA. Patiently wait and you may get someone to call you back.
Last edited by Frank I.; Nov 23, 2013 at 02:12 PM.
Any how, the faulty SBC has been replaced, that's what matters, even though I think MBZ should bear all the cost in fixing this potential faulty safety device. I ended up paying for the labor because I just want the car back, because it was sitting at the dealer for over a week(on a job that should take a day or less)while waiting for MBZUSA to respond. And a few days were wasted because the inefficient computer system/human set my case aside without passing it on to higher level for consideration.
Thank you for responding and have a Happy Thanksgiving.







[QUOTE=bernard farquar;4936974]crap.[/QUOTE