SL/R230: Help with ABC
Super Member
Joined: Sep 2021
Posts: 528
Likes: 113
From: Ann Arbor, MI
2004 SL600
You are going to need a MB "Star" or "Xentry" clone system or a good scanner to clear the suspension faults.
I have both the MB Xentry system, setup by the BenzNinja here, and an Otofix IM2 scanner ($2500) which is the unsupported version of the Autel IM608 Pro scanner ($3500).
Both let me calibrate the suspension. Perhaps/hopefully less expensive scanners can also calibrate the suspension. However the Xentry system and BenzNinja's online support is hard to beat.
There are functions to check the level sensors, the shock/plunger values, calibrate the plunger travel and load adjustment. I had trouble with these calibrations, which I will document in a new thread soon.
In my (limited) experience when you have the C1525/1526 codes, the ESP will also show faulty.
Hopefully others have simple solutions to your SAM and OCP errors.
I have both the MB Xentry system, setup by the BenzNinja here, and an Otofix IM2 scanner ($2500) which is the unsupported version of the Autel IM608 Pro scanner ($3500).
Both let me calibrate the suspension. Perhaps/hopefully less expensive scanners can also calibrate the suspension. However the Xentry system and BenzNinja's online support is hard to beat.
There are functions to check the level sensors, the shock/plunger values, calibrate the plunger travel and load adjustment. I had trouble with these calibrations, which I will document in a new thread soon.
In my (limited) experience when you have the C1525/1526 codes, the ESP will also show faulty.
Hopefully others have simple solutions to your SAM and OCP errors.
Super Member
Joined: Sep 2018
Posts: 746
Likes: 183
From: Melbourne, Australia
2005 SL 500 R230
What error messages on the dash prompted the issue?
When did the ESP message arise? If you disconnect the battery you'll usually get it but can clear it by driving the car or turning the wheel lock to lock.
It might be a speed sensor.
***
OCP fault highly likely to be a broken thermistor in the panel. Read up on https://www.benzworld.org/threads/in...#post-18144033
Easy fix if so.
As always, clear everything out and see what codes come back.
When did the ESP message arise? If you disconnect the battery you'll usually get it but can clear it by driving the car or turning the wheel lock to lock.
It might be a speed sensor.
***
OCP fault highly likely to be a broken thermistor in the panel. Read up on https://www.benzworld.org/threads/in...#post-18144033
Easy fix if so.
As always, clear everything out and see what codes come back.
Super Member
Joined: Sep 2021
Posts: 528
Likes: 113
From: Ann Arbor, MI
2004 SL600
After these all succeed, you should then be able to clear the ESP codes.
Last edited by mrvedit; May 25, 2025 at 06:32 PM. Reason: add pics
Super Member
Joined: Sep 2021
Posts: 528
Likes: 113
From: Ann Arbor, MI
2004 SL600
No, the plunger sensor are not calibrated individually.
Remember there are also mechanical level sensors on each wheel.
My understanding is that the calibration steps coordinate the values from the level sensors with the values from the plunger sensors. That way the system can detect when something has gone wrong.
After you hit "Start" the car moves on its own with the front going up and down to its max positions and likewise for the rear. The movements appear to me more extreme than a "rodeo".
Remember there are also mechanical level sensors on each wheel.
My understanding is that the calibration steps coordinate the values from the level sensors with the values from the plunger sensors. That way the system can detect when something has gone wrong.
After you hit "Start" the car moves on its own with the front going up and down to its max positions and likewise for the rear. The movements appear to me more extreme than a "rodeo".
