2007 R230 20 CAN codes

[keveewevee]

I am a mechanic 40 years, I can get through most things on my SL550 but sometimes I lack direct previous experience on diagnosing MB. It is worse when its my own car. There are so many codes, When you start the car it says convenience functions not available. And then after it has been running maybe 20 to 30 minutes that message clears. Cannot communicate with any SAM's upper or lower panel, PCM ok comm. Majority of codes say ""in single wire mode" 9372, 9370, 9377, 9373, 938F, 9385, 9371, 9381, 937C, 937A, 937D, 9378, 9384, 938C, 9379, 9374, 9388, 9375, 9387, B139C. These codes return immediately after clearing as well. Can someone advise me?

 

[Blobcat]

Hello and welcome,

R230’s like well charged batteries - keep the big battery in the boot on a battery conditioner and a lot of those codes should go away.

Make sure there’s no water ingress in the boot as that can also lead to numerous issues.

The R230 is well represented on here @LostKiwi and @00slk being 2 members with extensive R230 experience

 

[ajlsl600]

As above. I had a few issues myself. Make sure batt good. Note n clear many historic codes, a lot often just related to low voltage my Vdoz lived on ctek resolved all my voltage related issues, codes.I
If u get repeated can bus errors look for loose connections or, in my case rodent damage n the little f, s camp in the most unaccesable places!!!! The little b, s built house around rear abc valve block n caused me weeks of grief.