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I get this warning light appear in the dash from time to time and usually it will clear on it's own in 60 seconds or less. Triangle shaped lights also appear in the side view mirrors and then go out when the warning message clears. Has anyone else experienced this? Loose wire or sensor?
I had the same problem recently and it turned out to be wire connection that had worn through over the years. MB Aust was able to tell me which sensor was generating the fault code and quoted A$2500 to replace the sensor (which would have even fixed it given it was a wiring issue). The fault was LHS rear so I decided to pull it out (which is messy but definitely doable). When I was removing it I noticed one of the wiring looms had been worn through and one of the wires had the sheathing worn as well. I speculated that may have been causing the fault but tested it by cutting the suspect wire and patching in a temporary wire to see whether that fixed the dashboard message, which it did. I then replaced the wire on a more permanant basis and presto it was fixed.
Given you fault is intermittent, I suggest it is a simialr issue, i,e, loose or worn wire wire. On inspection the rear ones are poorly routed and the RHS wiring loom was also showing signs of wear. I re-applied some anti-abrasion tape and zip-tied it to eliminating any rubbing.
Thanks and that's what I figured. Mind telling me where I can find this wiring harness or approximate location on LHS (left hand side rear)? Picture would be helpful as I'd like to try and handle myself. TIA!
The sensor is attached to the inside of the rear bumper return. Photos attached.
I ended up removing the return which had to be accessed via the rear wheel well. It is not technically difficult but just convoluted. ( in typical G wagon style)
Think I'm experiencing the same issue. Luckily I found your post from 2021. My turn signals also stop working when I receive this Blind Spot Assist inoperative error message. It's becoming more persistent now when before the error message would clear on it's own. Did you have to remove any insulation from the RHS wheel arch to access?
Think I'm experiencing the same issue. Luckily I found your post from 2021. My turn signals also stop working when I receive this Blind Spot Assist inoperative error message. It's becoming more persistent now when before the error message would clear on it's own. Did you have to remove any insulation from the RHS wheel arch to access?
My vehicle is a 2016 G63. The process was reasonably straight forward. There is a plate on the inside of the rear bumper (right on the corner). Removing that gave access to the unit. I didnt have to remove any insulation from the wheel arch (not sure my vehicle has any). If I recall correctly, I may have had to loosen some of the bolts on the internal plastic guard to get better access. Other than that it was pretty straight forward. Check the wiring loom for wear as they are poorly routed in my view which puts them at risk of rubbing and subsequent breaking/shorting of wires.
@DVR
Which is the unit that is causing the error? I inspected several wires and most are for the rear bumper sensors or the side marker. I'm attaching some pictures if you could help identify. No wires look frayed or rubbing. Images are from right side to left. TIA
never mind. I think I have traced wiring to this unit which is in the corner behind a plastic cover plate. Based on the part number it is the blind spot radar sensor module. No wiring looks to be pinched or fraying so it must be a fault with the unit. Checking online I'm seeing a vast number of options. Assume I should stay away from used?
Can anyone recommend a good parts supplier for this item in USA?
Part numbers:
ZB A 000 905 45 03
SW A 000 902 75 16
HW A 000 901 88 02
That is the sensor. What is the wiring loom like as my problem was that wire sheathing was worn down. I did fixed the wiring and everything was working fine but a trip I did last year to Cape York involved a number of water crossing and so the fault is back albeit intermittantly. It seems do appear for 10 seconds and then you wont see it for a few days.
Best of luck sourcing one. You should be able to secure a second hand one as they are a common unit across a number of mercedes models
Thanks confirming @DVR . I called MB just to check their list price on the unit and they quoted over USD$800 just for the unit. I thought it would be plug and play, but they advised that once changed, it needs to be calibrated to the vehicle. Not sure I would be able to do that. I only possess a simple OBD scanner. Anyone know if this is true and if I might be able to calibrate myself?
Thanks confirming @DVR . I called MB just to check their list price on the unit and they quoted over USD$800 just for the unit. I thought it would be plug and play, but they advised that once changed, it needs to be calibrated to the vehicle. Not sure I would be able to do that. I only possess a simple OBD scanner. Anyone know if this is true and if I might be able to calibrate myself?
TIA
I had been advised the same, i.e. it will need to be calibrated to the vehicle. Obviously, I didnt need to go through that step as I 'sort of' repaired mine. I spoke to my auto electrician and he didnt have the right kit to calibrate if needed. It is a bit of a pain for sure particulary since they are a nice to have as opposed to a must have piece of kit on your car.
Thanks confirming @DVR . I called MB just to check their list price on the unit and they quoted over USD$800 just for the unit. I thought it would be plug and play, but they advised that once changed, it needs to be calibrated to the vehicle. Not sure I would be able to do that. I only possess a simple OBD scanner. Anyone know if this is true and if I might be able to calibrate myself?
In my experience it does not need to be calibrated. One of mine stopped working and I replaced it, worked completely fine without anything else besides swapping the module.
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