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Wipers and turn signals stop working while driving
A few weeks ago I was driving my 2010 E550 4matic in the rain at night. Part way through the drive the wipers and turn signals stop working while driving. I parked the car, turned it off and opened the door. I decided to restart the car and try the wipers and turn signals, they were both working again. A few days later the same thing happened, I pulled over and turned off the car, then restarted it, but the wipers and turn signals didn't work. I had to turn off the car and open the door, then restart the car, then the wipers and turn signals began working. Seems like I need to turn off the car, open the door to shut off everything, then restart it and all is well for a while. The wipers and turn signals both run on fuse #13. Is it possible the relay powering fuse #13 is going bad? If so, do you know which relay powers fuse #13?
Have you scanned the vehicle for error codes? MB specific scanner will be best.
Noticed any water intrusion in the vehicle? Humid carpet near thr edges, either passenger/drivers sides? Or near the front fuse box under hood?
Just following procedures, but it seems related to the steering column switch unit. Poor contact. A module is getting confused/hung/crashed, that is reset when the car is turned off, and locked.
Thanks for the suggestions. I have not notice any water inside, I will check the fuse box for the same. I don't have a MB scanner, do you have a scanner (brand) that you would recommend that won't break the bank?
I have iCarsoft MB/Euro specific, but would not recommends because of price @$200; however, some in the forum recommends Autel AP200 @$70 and though I have only used it for Honda I was very impressed.
Search for AP200 in MBWorld for recommendations. @cetialpha5 likes it a lot.
Note: I have an Xentry passthru setup, but it is not a turn key solution to start with.
I have iCarsoft MB/Euro specific, but would not recommends because of price @$200; however, some in the forum recommends Autel AP200 @$70 and though I have only used it for Honda I was very impressed.
Search for AP200 in MBWorld for recommendations. @cetialpha5 likes it a lot.
I only like it because it's cheap. There's a few others out there, I used to like the Launch X431, but it stopped working after a few years and then I couldn't get the new thinkcar pro to work correctly but at the time it was about $40 so I just gave up and just got the Autel. Probably could have gotten it working eventually but didn't have the time to fiddle with it. The Autel AP200 is about $53 now. Scans all subsystems. It's cheap because it' doesn't have a screen, basically just a dongle for the OBDII port. Those other systems have a screen so they cost more. Autel also has full systems that cost hundreds if not thousands but those work on all cars, the AP200 is limited to one car manufacturer which is perfect for the DIY person who just wants to fix their own car and doesn't need to pay the big bucks to cover all car manufacturers like a shop would need. You can add additional car manufacturers if you want, but there's an additional charge for it.
Oh one other thing, try opening the hood and slamming it. There's a hood sensor and I remember once when it wasn't fully closed, the wipers didn't work. I think the turn signals did but who knows, might not remember it correctly or didn't try. MB ties a lot of subsystems together for no particular reason. It's crazy that when the outside temperature sensor goes, you get no a/c. You'd think they let you run it in manual mode or that there's inside cabin temperature sensors but nope, no outside temperature no a/c.
Affecting both wipers & turn signal ‘may’ be column module. Feeling ambitious you could check associated front SAM connector/pins & CAN connection for moisture, etc. since it first happened while raining but best to have someone pull codes using Xentry (MB diagnostics).
Do not get me wrong, if the Benz app for the AP200 is as good as the Honda one, I could have saved 100+ on the iCarsoft one. Thinking about it for the on the road surprise.
> CAN services
It's a great idea for *everyone* to rework their amazing SCM and neighbor EIS module if at all possible. New/used modules hide the exact same defects. They are built new to act as old rapidly.
> WIS Docs:
-- I am thinking how to best help troubleshoot this... we need the W212 Network Diagram showing what module, peer nodes are on what network....
-- From that we can spot the many gateways and sanitize strings into reliable functions.
-- Without CAN visibility xFer chaos continues. We got a bit more discoveries left to do on CAN-C, E...
-- Solid info is always valuable to get these hightech cars running a whole lot better!
✌️
Last edited by CaliBenzDriver; Mar 26, 2023 at 04:12 PM.
Oh one other thing, try opening the hood and slamming it. There's a hood sensor and I remember once when it wasn't fully closed, the wipers didn't work. I think the turn signals did but who knows, might not remember it correctly or didn't try. MB ties a lot of subsystems together for no particular reason. It's crazy that when the outside temperature sensor goes, you get no a/c. You'd think they let you run it in manual mode or that there's inside cabin temperature sensors but nope, no outside temperature no a/c.
I opened the hood, the wipers did not operate, but the turn signals did function. Thanks for the suggestion.
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