Mackhack

Some generic scanner misinterpret error codes because they go by the 571 universal OBD codes. I'm not sure what your scanner does but I can't find the exact code. And there are about 15 errors with the same explanation (without "yaw sensor" like in your text).

If you have the chance to get it read out with a SD post the error code as well.

Yea I'm talking about the front seat. The rear doesn't have seats. It's a bench

Your car is not one of the first. Yours is right in mid production right before facelift. I'm sure I'm right about the location. It takes 4 screws for the front passenger seat to remove. Unplug all cables and air hose if you have multicontour seats. Push the seat onto the rear bench and turn it so it won't fall forward.

Take the door sill off, take the gray weather strip like ring off, pull up the carpet and look underneath.

It takes not even 10 minutes to check in case you want to.

DPDISXR4Ti

Sorry for the delayed response. Thanks for posting the details.

I did just update the scanner software recently so I'll try again just to see if there might be any "better" info provided. I hate doing parts-swapping diagnostics, especially now that we're looking at a $200 sensor rather than a $15 switch.

MooflesThaCat

I'm having this problem too. I got the white BRAKE message so i replaced the brake switch as the OP recommended but the error remained. I hooked up the car to STAR (very new to this) and got a message similar to this, but the SBC pump is relatively new (<2 years old). I'll hook the car back up to STAR when i have a chance and pull the exact error code, but do you have a suggestion? The SBC pump works as it should...as far as I can tell.

Mackhack

Just hook it up and let us know. Anything else is asking the crystal ball and won't help.

DPDISXR4Ti

I updated my software and pulled these codes (typed exactly)...

4CF1 Check component B24/15 (Rotary speed and lateral acceleration sensor)
4D41 Check component N49 (Steering angle sensor)

Both codes will clear but the 4CF1 immediately returns. I imagine 4D41 will eventually return.

I've also confirmed that the yaw sensor was replaced. In fact, two different sensors were tried with no changes.

Now that I'm getting the 4D41 error, is it time to replace the steering angle sensor?

Mackhack

Not necessarily. Cold weather can cause the metal to contract and the sensor pins lose contact with its counterpart. If the car is in cold weather conditions when it happens you can bring it to an Indy shop and explain it to them. They need to bend the contacts out more so they don't lose contact. I doubt MB will do this for you and they will only replace the sensor and charge you for it. I have seen plenty of cars where this very method saved them hundreds of dollars. Give it a try and report back for future people looking for an answer.

cal1

Just wanted to say thanks to Mackhack for all of the great posts. Many of us are going to deal with these same issues at some point and contained within this thread are the answers.

DPDISXR4Ti

Interesting alternative approach. The problem (no CC) has existed since temps were higher, but the 4D41 error has only just recently appeared. Can you bend the contacts out with the sensor in place, or does it still need to be removed?

Mackhack

Remove airbag, remove steering wheel, remove steering wheel angle sensor assembly. Take a look at it and correct what you feel might be lose or could be lose.

Working with airbags, DISCONNECT ground lead of your battery in the trunk, remove the key and/or keep your Keyless-Go key or card away from the car (at least 15 feet).

Do so at your own risk of course.

If you need WIS documentation about this whole thing let me know and I'll post them.

DPDISXR4Ti

That would be great if you could. Thanks.

And yes, even though the service manual tells you to disconnect power for almost everything, this is one of those project where you actually need to do it.

Mackhack

Will do this weekend.

DPDISXR4Ti

I know it's easy to get side-tracked at this time of year, so if you get a chance sometime over the next week, it would be great if you could post up the details on this.

Thanks!

Mackhack

I extracted them already and forgot to upload them. I'll do it this weekend.

Mackhack

Here are the pdf files. Hope it helps someone. I didn't extract every single cross referenced one because some are just common sense steps or safety notes. If someone needs a specific one just reference the corresponding document number and I'll upload that one as well.

Richard Vivier

sorry if this doesnt apply but needed to share here in canada and i have printed email to provew it my 2003 sbc pump is still Under warranty and my dash lit up like a chrismas tree 2 days ago but when i restarted the car it was gone now i almost want it to fail so they can replace it for free

jumph4x

Thank you very much to the OP. This was the case with my car. Easy to diagnose by shorting/opening the switch/connector contacts to confirm problem.

Maroc_Specops

guys, just did the break light switch change. Wonderful post. Saved me a couple of hundred bucks @ the stealer.

first I though sbc pump, but its just this cheap *** switch.

cal1

Nice! Always glad when someone gets over on a stealer.

Maroc_Specops

yeah, Ive been ripped of several times by them. but now not !

Jiptstarr

I have done everything from diagnosis to brake light switch to brake pads and rotors change and to no avail . Still remains Visit Workshop

Mackhack

What did the Star Diagnosis quick test reveal? It’s important to be able to interpret the findings correctly. SD doesn’t always say what exactly is wrong but rather give an idea. It’s important to use the information and interpreter it correctly. You replaced good parts for good parts.

Rotors have no sensors, hence this couldn’t have thrown a fault. The message also comes up if one of the ABS impulse sensors or wheel rotation sensors go out.

Let us know what it was.

sbwk

I got the white "Service Brakes, Visit Workshop" message. An independent workshop did a scan (not STAR) told me it returned code C2131, faulty SBC pressure reservoir.

With it returning a specific code like this, is there any chance that it could be just a faulty switch?

Note: I learned about the extended warranty on the SBC pump and contacted Mercedes-Benz. They told me that I had missed the extended warranty period by about a 18 months, and they declined to provide any warranty repairs.

Mackhack

No because it is a specific code and it even tells you what it is.

MR E55 AMG

Quick question...I have the same "Brake Visit workshop" warning on my dash also, but my push to start works fine and I just changed the front brakes and sensors , the rear look fine. I also changed the brake stop switch a year ago....what could it be??

Mackhack

ABS impulse rings literally decay over time to dust and break and may even fall off, faulty speed sensors,...

Read out your fault memory with Star Diagnosis only and let us know what it shows and we can better help you.