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Old 06-23-2019, 07:33 PM   #1
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Default 2013 RS Adventurous indicator lights

I have a 2013 RS Adventurous on a Mercedes Sprinter 3500 Chasis. The ESP, ABS and ASR/BAS indicator lights have come on. Anyone know what one can do on a Sunday? Vehicle drives fine and other than indicator lights seems fine. Operator’s manual says it could be low battery but it seems to be charging fine. (Starts fine and no indication that it is not charging )
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Old 06-23-2019, 10:16 PM   #2
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I have a 2013 RS Adventurous on a Mercedes Sprinter 3500 Chasis. The ESP, ABS and ASR/BAS indicator lights have come on. Anyone know what one can do on a Sunday? Vehicle drives fine and other than indicator lights seems fine. Operator’s manual says it could be low battery but it seems to be charging fine. (Starts fine and no indication that it is not charging )
Very likely a rear wheel speed sensor. Extremely common failure mode. You need a dealer. Most seem to stock the sensors (they get this a lot). I have had three such failures. Sometimes you can get into a limp-mode, but not always. A free scan at an auto parts store may diagnose the problem, but what good would it do you?

This is one of the recurring faults that has made it impossible for me to trust our Sprinter. Should be a minor issue, but it isn't.
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Old 06-28-2019, 12:20 AM   #3
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My problem turned out to be a R/R speed sensor. The Sprinter Store in Portland was busy for the next two weeks but they directed me to their shop in Tualatin. The service rep, Foster, suggested that I at least bring it in and they could get their code reader to diagnose the problem although they couldn’t get to repairing it for a few days. Long story / short I took it in and they diagnosed it and ordered the part and I went back the next day and they fixed things. Went on with our camping trip and 500 miles later there are no further issues. On the whole I am happy that they could move things around and accommodate me.
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Old 06-28-2019, 12:58 AM   #4
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Thanks for closing the loop. Glad your trip wasn't TOO disrupted.

I really hate to say it, but be prepared for the other rear sensor to go real soon now. They VERY often fail within 1,000 miles or less of each other. Nobody seems to know why, but the pattern is clear.
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Old 06-28-2019, 03:35 AM   #5
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Very likely a rear wheel speed sensor. Extremely common failure mode. You need a dealer. Most seem to stock the sensors (they get this a lot). I have had three such failures. Sometimes you can get into a limp-mode, but not always. A free scan at an auto parts store may diagnose the problem, but what good would it do you?

This is one of the recurring faults that has made it impossible for me to trust our Sprinter. Should be a minor issue, but it isn't.
Do you know what is the failure mechanism, what I read it is a simple coil generating voltage by rotating magnet on the rotor. What is there to fail, contacts?
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Old 06-28-2019, 03:50 AM   #6
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Do you know what is the failure mechanism, what I read it is a simple coil generating voltage by rotating magnet on the rotor. What is there to fail, contacts?
As I understand it, Mercedes speed sensors use a tone ring on each wheel and (if I know German engineers) some kind of vastly complex active sensor that detects the teeth of the ring as they go by.

I really don't know what the failure mode (or modes) are. I have heard various theories concerning dirt in the tone ring, actual sensor failure, connectors, etc. Who knows? I do know that sometimes you just lose ABS and stability control, and other times you end up in limp mode (I have experienced both personally). This suggests that there is more than one failure mode. That is the only data I have, though.
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Old 06-28-2019, 04:06 AM   #7
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As I understand it, Mercedes speed sensors use a tone ring on each wheel and (if I know German engineers) some kind of vastly complex active sensor that detects the teeth of the ring as they go by.

I really don't know what the failure mode (or modes) are. I have heard various theories concerning dirt in the tone ring, actual sensor failure, connectors, etc. Who knows? I do know that sometimes you just lose ABS and stability control, and other times you end up in limp mode (I have experienced both personally). This suggests that there is more than one failure mode. That is the only data I have, though.
Thank you, it seems as insufficient engineering or manufacturing. DEF temperature sensor should not fail either, likely just a simple thermistor.
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Old 06-28-2019, 04:56 AM   #8
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Well, i must say that I learned a lot about these sensors while waiting in the shop for the work to be done as I looked online about them. One of the things is that there is no need to clear the codes after replacing because they will clear once the vehicle is driven. So, I am a bit curious because this is the way events transpired: I waited in shop the service mgr came and said that the work was just about done and then the mech would test drive. Then he came back and said that the mech came back and drove into the work bay. He said that he would see what was up. He came back about 15 mins later and said that on the test drive the codes did not clear so the mech cleaned the holes because there was some rust and now the codes were clear. So in the back of my mind I am wondering if it was the rust all along and that maybe just a cleaning was all that was needed. If I get another failure that will be my first move.
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Old 06-28-2019, 01:27 PM   #9
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Well, i must say that I learned a lot about these sensors while waiting in the shop for the work to be done as I looked online about them. One of the things is that there is no need to clear the codes after replacing because they will clear once the vehicle is driven. So, I am a bit curious because this is the way events transpired: I waited in shop the service mgr came and said that the work was just about done and then the mech would test drive. Then he came back and said that the mech came back and drove into the work bay. He said that he would see what was up. He came back about 15 mins later and said that on the test drive the codes did not clear so the mech cleaned the holes because there was some rust and now the codes were clear. So in the back of my mind I am wondering if it was the rust all along and that maybe just a cleaning was all that was needed. If I get another failure that will be my first move.
Cleaning may be worth a try. But, there is at least one report over at Sprinter Source where a cleaning appeared to fix the problem, but that it came back in a few hundred miles, requiring a sensor swap anyway.
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Old 07-04-2019, 06:34 PM   #10
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I have a 2013 RS Adventurous on a Mercedes Sprinter 3500 Chasis. The ESP, ABS and ASR/BAS indicator lights have come on. Anyone know what one can do on a Sunday? Vehicle drives fine and other than indicator lights seems fine. Operator’s manual says it could be low battery but it seems to be charging fine. (Starts fine and no indication that it is not charging )
I have a 2006 MB Sprinter with the same problem, I get it serviced at a Dodge dealer that is qualified to work on MB Sprinters, they told me not to be concerned, the lites will go out while you are driving or when you start it up the next time, I have had no problems related to the indicator lites.
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