Hi guys I just changed the brake pads and discs also the hand brake pads on my W212 Facelift E220 CDI manual gearbox first registration 2013, without even knowing I have the SBC ( Sensotronic Brake Control). Well now I have everything new(brake discs and pads)but there is a problem, both rear wheels are locked by brake pistons, I tried to push pistons back again already with SBC off and same problem once I push brake pedal the pistons don't come back. I think I need to recalibrate the SBC I founded a video on YouTube on how to do it on an SL model ( link down ) I did exactly how it was on the video and still didn't managed to succeed. Or maybe they are locked by Hold function but I tried to drive the car and still same thing, pistons don't come back. Any help 🙏 😢
PS : i don't have any errors that comes after brake change and hand brakes absolutely not touching the discs
SBC on SL model : https://youtu.be/4B3wX5-cYng?si=XMTjVD2ooc0L7vBf

 

If you have SBC, it needs to be electronically disabled when working on the brakes, otherwise it is dangerous to do so. After the work, the SBC needs to be reenabled. Do you have a scan tool that does that?

I'm kinda surprised to see a solid disc rotor. What year is your car and what country are you in?

 

In my cars, the parking brake does not use the disc pads, but rather brake shoes inside the rotor, much like ancient non-disc brakes. That said, with the parking brake off, which it had to be if you replaced the rear rotors, the wheels should spin without resistance. But, again, if you are talking about the rear brakes, then you have the drivetrain that will hold the wheel in place.

Also, SBC requires the use of a scan tool to operate the brake bleeding procedure, which is somewhat involved and does NOT follow the traditional process of starting with the furthest wheel from the master cylinder and working toward the closest wheel (i.e., right rear, left rear, right front, left front is NOT the order to follow).

 

OK. I watched the video and did not realize you could deactivate and activate the SBC without a scan tool. But you still MUST deactivate before working on the brakes.

 

Thank you for your answer))
I have a w212 facelift E220 CDI from 2013, bought from Germany
I don't have any scan tool, maybe should bring the auto to a car service and hope they can fix that but till then I can get maybe some help 😉 as long as I didn't got any errors I have to recalibrate the pistons and should be fine

 

Here are some good, inexpensive scan tools for Mercedes. Every owner should have one.

• iCarsoft MB V3.0 (not MB II)
• Launch Creader Elite BENZ
• Foxwell NT510 Elite

I recommend you get your own Mercedes-specific scanner, such as iCarsoft MB V3.0, LAUNCH Creader Elite BENZ, or Foxwell NT510 Elite so that you can scan your car at any time. In the US, they are pretty inexpensive compared to what I've seen them sell for elsewhere. Still, you really need one. They are small enough to store in your car (such as the fuse compartment in the trunk). Sometimes a code may cause the car to run rough and clearing it will restore normal operation until you get a chance to check it out.

(Do not waste your money on the iCarsoft MB II. It is slower and requires you to check each module separately for codes. MB V3.0 runs an automatic scan and will identify modules with DTCs so you don't need to check 30 or 40 modules individually.)

 

The E250s (USA) have solid rear rotors, assume its the same with the E220s. Just FYI

 

There were W212's equipped with SBC? I thought that Mercedes abandoned SBC on the W211's in 2007.

 

I think when this car was ordered the buyer wanted an SBC system, not sure

 

Ok I'm going to go out on a limb and say no W212's came with SBC. For sure that is true in the US. Would like to hear otherwise for the ROW.

Are we sure we aren't talking about the ABS system?

 

Despite SBC being a great system, it was ahead of its time and the complaints from owners and mechanics alike meant that MB did indeed abandon it with the facelift on the W211 model.

 

SBC is quite amazing...until it quits on you based on a predetermined number of activations. That's not planned obsolescence, it's programmed obsolescence.

 

Advanced braking is Bosch's bread and butter. We got to hand it to them... they really work their subject

I ordered my W212 with the option that pilots my brake pressure as the car is closing in with the car ahead. I love it everyday, like the electric steering rack.

The driving skill of adjusting the foot pressure on the brake pedal to stop with moving traffic, will soon be forgotten.
Having an interactive pedal is good driving comfort. Much like automatic tranny, no cluch, no stick shift and up to 9 gears... pure bliss

When all that technology works it's fantastic then we get the engineered nightmares to pay for it.

Step 01: buy priceless design core
Step 02: double check amazing wiring
Step 03: come again real soon


> Reduced performance mode:
Imagine what happens when the car quit managing braking distance or skidding over slick roads.
Every working system is built to disfunction in a safe way to prevent it becoming extra dangerous from disrepairs.
Recently some of us discovered brake improvement due to lowered crankacase pressure. Most ppl brakes work poorly but they are not aware of it.
Now that technology is adding a layer of control over the spinning wheels, we need to learn signs of poor performance... "dry sliding pins", solderless ESP).
No SBC, different problems anyways.


> Troubleshooting fault modes
Not all degraded performance come with a matching code. It's up to us to pickup on clues of poor performance.
It is a perfect struggle to get the high maintenance princess taken care of.

Recognizing an underlying issue is present with these networked systems is half the battle.


> Repairs:
Luckily German manufacturing is really well tested, random failures are parts per many thousands.

Repairs are simple once problems are identified correctly. That's the hard part. Root cause is always a gem to discover.


> TIP:
- If you have a stable electrical system you are ahead of the game for way less troubles if any.

- Get your voltage and currents under control to minimize riples.

- This will help keep the poor solderless connections as quiet as possible until you have fix or replace modules.

 

W212 facelift don't have SCB.

And after change all new disk, pad and hand pad. No erro, so you can try blend ESP with xentry or any scan tool have ESP blend.

Good luck.

 

Anatolie, why dont you take photo of the famous "Balloon-Rservoir" the SBC uses . https://www.fcpeuro.com/public/asset...uu.?1546982515
Show us this exotic options on a W212, it will be a great rarity.