Pre-safe inoperable on/off/on/off
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MBWorld Fanatic!
Joined: Jun 2017
Posts: 1,373
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2020 GLS450 (wife) / 2024 Ford Bronco (mine) / 2014 VW Tiquan (son)
Pre-safe inoperable on/off/on/off
Ok, I tried searching for this one and totally got lost in the forest of the results all over the platform. Sounds like I’m either about to return to 1986 with McFly & Doc, car is about to shut off, or my wheels are able to fall off...
so, getting this error now every now and then. Is there a more-than-likely list of causes down to less-than-likely? I’m at 45k miles on a 2014. Replaced the aux battery in the trunk last year. Presume main battery is original. Brakes/rotors replaced 20k miles ago with genuine MB parts (lesson learned - they suck). Have noticed groaning noises when braking in the front, certainly doesn’t sound “Mercedes” like. But stops on the dime.
So... anything more common to check before calling the shop?
where is the sensor located? Is the glass behind the center rear view mirror? Isn’t dirty but can certainly wipe it clean(er) if that’s where it is located??
thanks!
so, getting this error now every now and then. Is there a more-than-likely list of causes down to less-than-likely? I’m at 45k miles on a 2014. Replaced the aux battery in the trunk last year. Presume main battery is original. Brakes/rotors replaced 20k miles ago with genuine MB parts (lesson learned - they suck). Have noticed groaning noises when braking in the front, certainly doesn’t sound “Mercedes” like. But stops on the dime.
So... anything more common to check before calling the shop?
where is the sensor located? Is the glass behind the center rear view mirror? Isn’t dirty but can certainly wipe it clean(er) if that’s where it is located??
thanks!
MBWorld Fanatic!
Joined: Feb 2014
Posts: 6,190
Likes: 1,550
From: MA
2008 E350 4Matic, 2011 E350 4matic
Well it probably still has error codes stored so you should get some kind of scanner that can read MB specific codes. Lots of them out there, Autel Diaglink, icarsoft, icarscan, etc.
Oh as for brakes, I just did Zimmerman rotors with Akebono pads from FCPeuro, lifetime warranty so I'm all set for next time. Akebono are great for minimum brake dust. No groaning or anything although I wouldn't automatically blame the brakes, could also be bushings or other suspension parts. or even the dreaded motor mounts.
Oh as for brakes, I just did Zimmerman rotors with Akebono pads from FCPeuro, lifetime warranty so I'm all set for next time. Akebono are great for minimum brake dust. No groaning or anything although I wouldn't automatically blame the brakes, could also be bushings or other suspension parts. or even the dreaded motor mounts.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2017
Posts: 1,373
Likes: 781
2020 GLS450 (wife) / 2024 Ford Bronco (mine) / 2014 VW Tiquan (son)
Many thanks! I’m going to have the car scanned when I take it back to my mechanic to get the transmission fluid changed (and fix that bolt on the pan).
I think I have the dreaded motor mount issue, and the trans mount now too. I’ve had several cars in the past where the motor mounts where clearly going bad, this one is showing those signs now too.
I also cite the transmission mount as I now have a rumble in the car when it goes into 5th on light acceleration. It’s not slipping, just a rumble under my seat through out the frame of the car. Lasts maybe 1 second, but always 5th gear. Started faintly about a month ago every so often, but getting worse now (maybe 1k miles total during that time). I suspect 5th gear is somewhere in the transmission where the weight of the mechanical shifting into that gear hits just that sweet spot that, with just the right amount of torque on the system, is putting metal on metal of the mount for just that split second. I have a feeling new mounts throughout will likely reset the car.
If my mechanic is correct about the heat of exhaust manifold accelerating the decay of the motor mounts, and I don’t doubt him as his knowledge of MB is stellar beyond belief, then no doubt in my mind the mounts are likely there, regardless of mileage. This car has seen lots of sitting/inching along in DC traffic. Mileage maybe not suggest, but engine run time probably does. We shall see! Since I’ve decided to not replace it with a GLE, I’m going to fix a few things....
I think I have the dreaded motor mount issue, and the trans mount now too. I’ve had several cars in the past where the motor mounts where clearly going bad, this one is showing those signs now too.
I also cite the transmission mount as I now have a rumble in the car when it goes into 5th on light acceleration. It’s not slipping, just a rumble under my seat through out the frame of the car. Lasts maybe 1 second, but always 5th gear. Started faintly about a month ago every so often, but getting worse now (maybe 1k miles total during that time). I suspect 5th gear is somewhere in the transmission where the weight of the mechanical shifting into that gear hits just that sweet spot that, with just the right amount of torque on the system, is putting metal on metal of the mount for just that split second. I have a feeling new mounts throughout will likely reset the car.
If my mechanic is correct about the heat of exhaust manifold accelerating the decay of the motor mounts, and I don’t doubt him as his knowledge of MB is stellar beyond belief, then no doubt in my mind the mounts are likely there, regardless of mileage. This car has seen lots of sitting/inching along in DC traffic. Mileage maybe not suggest, but engine run time probably does. We shall see! Since I’ve decided to not replace it with a GLE, I’m going to fix a few things....
MBWorld Fanatic!
Joined: Feb 2014
Posts: 6,190
Likes: 1,550
From: MA
2008 E350 4Matic, 2011 E350 4matic
The transmission mount is simple, was easy to change out, I think my mechanic was done in less than 20 minutes. The motor mounts are the tough ones.
Don't forget, you can get the transmission fluid, ATF 134 FE from a shell distributor. Last time I checked it was a little over $65 for a case of 12 quarts.
https://www.shell.us/business-custom...r-locator.html
Don't forget, you can get the transmission fluid, ATF 134 FE from a shell distributor. Last time I checked it was a little over $65 for a case of 12 quarts.
https://www.shell.us/business-custom...r-locator.html
