SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: ABC Switch

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Old 11-21-2019, 08:22 AM
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2017 550SL - 2018 560S
ABC Switch

On my 2017 SL550 when I press the ABC switch, the ABC stays on permanently, even after turning the vehicle off and back on. It can only be deactivated by pressing the ABC switch when I choose. On my 2018 S560, the ABC (called Magic Body Control (MBC) on the S Class)switch automatically resets to off whenever the car is turned off. Perhaps both cars are functioning properly but I would prefer the S Class ABC (or MBC) would remain on whenever I activate it.

Can anyone confirm if my S Class MBC is functioning properly or perhaps my 2017 SL550 ABC is not operating properly? Perhaps both cars are working just fine but are programmed to operate the ABC (MBC) differently.
Old 11-21-2019, 09:37 AM
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2019 SL550/2023 EQS 580 SUV
Originally Posted by fun33
On my 2017 SL550 when I press the ABC switch, the ABC stays on permanently, even after turning the vehicle off and back on. It can only be deactivated by pressing the ABC switch when I choose. On my 2018 S560, the ABC (called Magic Body Control (MBC) on the S Class)switch automatically resets to off whenever the car is turned off. Perhaps both cars are functioning properly but I would prefer the S Class ABC (or MBC) would remain on whenever I activate it.

Can anyone confirm if my S Class MBC is functioning properly or perhaps my 2017 SL550 ABC is not operating properly? Perhaps both cars are working just fine but are programmed to operate the ABC (MBC) differently.
I am confused with part of your statement. I have a ‘2019 SL550 and there is no button to turn ABC on and off. The car would not ride properly unless it was on all the time. What does the button look like on your SL and where is it located?
Old 11-21-2019, 02:06 PM
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I have read your updated post on the S Class forum so I will answer here also.

That second button raises the whole body a tiny bit so that you don’t scrape the bottom on railroad track crossings or steep, sudden inclines such as entering or leaving parking lots at the street. I use that button to raise my SL at a local automatic car wash so the bottom does not scrape on the rail that guides the car through the car wash.

I have also used the button at a tire dealership to enable them to get the hydraulic frame lift under the SL. Under normal driving 99% of the time you would ride with the button “off”.

Last edited by Utopia Texas; 11-21-2019 at 02:11 PM.
Old 11-22-2019, 08:19 AM
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Thanks, Utopia, that clears it up for me.
Old 11-22-2019, 01:59 PM
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Originally Posted by Utopia Texas
I have read your updated post on the S Class forum so I will answer here also.

That second button raises the whole body a tiny bit so that you don’t scrape the bottom on railroad track crossings or steep, sudden inclines such as entering or leaving parking lots at the street. I use that button to raise my SL at a local automatic car wash so the bottom does not scrape on the rail that guides the car through the car wash.

I have also used the button at a tire dealership to enable them to get the hydraulic frame lift under the SL. Under normal driving 99% of the time you would ride with the button “off”.
....and in any event your car will lower when you hit about 50mph

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