Blind Spot Monitor
#1
MBWorld Fanatic!
Thread Starter
Blind Spot Monitor
Have a 2010 E550. The blind spot monitoring quit working on the driver's side, passenger side works as normal.
Took the rear bumper off the car for glueing one of the parking sensors holders as it had broken off on one side and the sensor was partially in the hole. At the same time took a look at the blind spot radar sensors and they both look the same, no corrosion or any visible sign of trouble on them. Disconnected the harness on both to "rub" the connection pins for bad connection but this did not help like cleaning them and bumper surfaces did not either.
Scanned the car already before the bumper job with my Xentry but no errors of any kind and what really bothers me is that blind spot monitoring was not even listed in the modules of the car. I did find under radar control module that "Blind spot monitoring installed", but nothing else.
I have been trying to find where the blind spot monitoring control module is but all I get is the sensor itself, so my question is: Is the sensor also the blind spot monitoring control module build into it?
My next step in this is to remove the bumper cover again and swap the sensors to see if the problem moves with the sensor. This would answer my question, I think, but thought to ask if anybody in this forum knows about this?
Took the rear bumper off the car for glueing one of the parking sensors holders as it had broken off on one side and the sensor was partially in the hole. At the same time took a look at the blind spot radar sensors and they both look the same, no corrosion or any visible sign of trouble on them. Disconnected the harness on both to "rub" the connection pins for bad connection but this did not help like cleaning them and bumper surfaces did not either.
Scanned the car already before the bumper job with my Xentry but no errors of any kind and what really bothers me is that blind spot monitoring was not even listed in the modules of the car. I did find under radar control module that "Blind spot monitoring installed", but nothing else.
I have been trying to find where the blind spot monitoring control module is but all I get is the sensor itself, so my question is: Is the sensor also the blind spot monitoring control module build into it?
My next step in this is to remove the bumper cover again and swap the sensors to see if the problem moves with the sensor. This would answer my question, I think, but thought to ask if anybody in this forum knows about this?
#2
MBWorld Fanatic!
My passenger side monitor was bad while the driver's side was good. Neither of modules/sensors looked bad, but you can't tell by a visual inspection
My scantool called these "left/right rear bumper intelligent radar sensor"
When I tried to access the right/passenger module, I received a "link error" so I assumed it was bad.
I replaced the passenger side monitor and all is well now.
BTW, I didn't pull the rear bumper. I could reach the modules from underneath.
So, I assume the module and sensor are the same thing (the box under the rear bumper)
Good luck
My scantool called these "left/right rear bumper intelligent radar sensor"
When I tried to access the right/passenger module, I received a "link error" so I assumed it was bad.
I replaced the passenger side monitor and all is well now.
BTW, I didn't pull the rear bumper. I could reach the modules from underneath.
So, I assume the module and sensor are the same thing (the box under the rear bumper)
Good luck
The following 3 users liked this post by ghlkal:
#3
MBWorld Fanatic!
Join Date: Apr 2019
Location: Silicon Valley
Posts: 6,059
Received 3,734 Likes
on
2,484 Posts
MY'14 W212 M276 3.5NA @60kMi
BS Module
You are right BSpot sensors are full featured modules with built-in independant CAN controllers.
One of the amazing part of troubleshooting is busted modules are quiet when bad enough they can't communicate... silenced!
Lucky you don't need to drop the bumper to access rear BS radar modules.
Harness connectors need to be RTV'ed to prevent water penetration into your new replacement module. These are not repairable after being swamped.
Hope this saves you time.
One of the amazing part of troubleshooting is busted modules are quiet when bad enough they can't communicate... silenced!
Lucky you don't need to drop the bumper to access rear BS radar modules.
Harness connectors need to be RTV'ed to prevent water penetration into your new replacement module. These are not repairable after being swamped.
Hope this saves you time.
The following 2 users liked this post by CaliBenzDriver:
BenzV12 (05-28-2024),
pierrejoliat (06-02-2024)
#4
MBWorld Fanatic!
Thread Starter
Thanks ghlkal and CalibenzDriver. You confirm my thinking on this problem.
I can access the sensors without removing the bumper cover but the problem is I cannot get the electric connector off. I had big trouble disconnecting when the bumper cover was removed. Is there a special trick to disconnect the harness?
I can access the sensors without removing the bumper cover but the problem is I cannot get the electric connector off. I had big trouble disconnecting when the bumper cover was removed. Is there a special trick to disconnect the harness?
#5
MBWorld Fanatic!
Join Date: Apr 2019
Location: Silicon Valley
Posts: 6,059
Received 3,734 Likes
on
2,484 Posts
MY'14 W212 M276 3.5NA @60kMi
leaky connector
Thanks ghlkal and CalibenzDriver. You confirm my thinking on this problem.
I can access the sensors without removing the bumper cover but the problem is I cannot get the electric connector off. I had big trouble disconnecting when the bumper cover was removed.
Is there a special trick to disconnect the harness?
I can access the sensors without removing the bumper cover but the problem is I cannot get the electric connector off. I had big trouble disconnecting when the bumper cover was removed.
Is there a special trick to disconnect the harness?
The lock release itself has a latch...
Help release with a small screwdriver or a pick.
🤞
#6
MBWorld Fanatic!
Thread Starter
You are right BSpot sensors are full featured modules with built-in independant CAN controllers.
One of the amazing part of troubleshooting is busted modules are quiet when bad enough they can't communicate... silenced!
Lucky you don't need to drop the bumper to access rear BS radar modules.
Harness connectors need to be RTV'ed to prevent water penetration into your new replacement module. These are not repairable after being swamped.
Hope this saves you time.
One of the amazing part of troubleshooting is busted modules are quiet when bad enough they can't communicate... silenced!
Lucky you don't need to drop the bumper to access rear BS radar modules.
Harness connectors need to be RTV'ed to prevent water penetration into your new replacement module. These are not repairable after being swamped.
Hope this saves you time.
So, swapped the sensors and the problem now moved to the passenger side. It definitely is a problem with the sensor and not with wiring or other parts.
Can I just buy a new sensor and it is plug and play? My Xentry does not see either side sensor so how could it program/code it anyway?
#7
MBWorld Fanatic!
Thread Starter
Below picture shows the two blind spot sensors in my car. The one NOT working is the Autolly one with MB logo on it.
These being different parts tells me the sensor on the passenger side (Tyco Electronics) had been changed already before. I installed it on the driver side where I need the blind spot monitoring more that the passenger side since the passenger side mirror is a convex that shows blind spot better.
Does anybody know what part number I need to match when I get a replacement for the non-functioning sensor? And further, where could I buy one other than the dealer?
These being different parts tells me the sensor on the passenger side (Tyco Electronics) had been changed already before. I installed it on the driver side where I need the blind spot monitoring more that the passenger side since the passenger side mirror is a convex that shows blind spot better.
Does anybody know what part number I need to match when I get a replacement for the non-functioning sensor? And further, where could I buy one other than the dealer?
Trending Topics
#8
MBWorld Fanatic!
Join Date: Apr 2019
Location: Silicon Valley
Posts: 6,059
Received 3,734 Likes
on
2,484 Posts
MY'14 W212 M276 3.5NA @60kMi
Rear radar fixin
No such luck as not dropping the bumper cover again to properly get to the sensors.
So, swapped the sensors and the problem now moved to the passenger side. It definitely is a problem with the sensor and not with wiring or other parts.
Can I just buy a new sensor and it is plug and play? My Xentry does not see either side sensor so how could it program/code it anyway?
So, swapped the sensors and the problem now moved to the passenger side. It definitely is a problem with the sensor and not with wiring or other parts.
Can I just buy a new sensor and it is plug and play? My Xentry does not see either side sensor so how could it program/code it anyway?
In your position I would go ahead and consider used BS modules.
I think module programming with Xentry requires online login unless your specific version features the off-line option.
The white backing plate on the OEM modules is well sealed by fused plastic - It's the connector that needs RTV protection.
Meaning don't replace module and think it's fixed.
Last edited by CaliBenzDriver; 06-02-2024 at 09:06 PM.
#9
MBWorld Fanatic!
Join Date: May 2018
Location: Jakarta-Indonesia
Posts: 4,528
Received 4,601 Likes
on
2,701 Posts
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
You have to access EPC using your VIN.
I for fun using W212.090 chassis code, M273 engine and there are so many different P/N depending on other options on the car and if code 803 or 804 the car is.
Holy cow.......
.
I for fun using W212.090 chassis code, M273 engine and there are so many different P/N depending on other options on the car and if code 803 or 804 the car is.
Holy cow.......
.
The following users liked this post:
pierrejoliat (06-15-2024)
#10
MBWorld Fanatic!
OP,
I replaced mine with a used one I found on eBay ...
see my post here https://mbworld.org/forums/e-class-w...ml#post8944615
You are right, it is really difficult to remove the connector! I had to use some pliers to carefully wiggle it while I pressed the tab.
Good luck
I replaced mine with a used one I found on eBay ...
see my post here https://mbworld.org/forums/e-class-w...ml#post8944615
You are right, it is really difficult to remove the connector! I had to use some pliers to carefully wiggle it while I pressed the tab.
Good luck
The following users liked this post:
pierrejoliat (06-15-2024)
#11
MBWorld Fanatic!
Thread Starter
OP,
I replaced mine with a used one I found on eBay ...
see my post here https://mbworld.org/forums/e-class-w...ml#post8944615
You are right, it is really difficult to remove the connector! I had to use some pliers to carefully wiggle it while I pressed the tab.
Good luck
I replaced mine with a used one I found on eBay ...
see my post here https://mbworld.org/forums/e-class-w...ml#post8944615
You are right, it is really difficult to remove the connector! I had to use some pliers to carefully wiggle it while I pressed the tab.
Good luck
First ordered a new sensor from ebay for $198. Thought that was a bit low cost for a new sensor but tried it. A used part came that I would have accepted for that price, but it did not work. It was actually worse than my own bad sensor as it disabled the whole Blind Spot system while my own just did not work on one side of the car. Returned this and got my money credited back.
Ordered sensor from mbpartscenter.com and installed that sensor and all is good.
The following 3 users liked this post by Arrie:
#12
MBWorld Fanatic!
That's good news , glad it's been working as it should
The following users liked this post:
CaliBenzDriver (06-14-2024)
#13
MBWorld Fanatic!
Thread Starter
Yeah,
I must be a stupid man to install a $500+ sensor in a car that has kbb value of $3000 - $4500, but to get a car with options and quality like my car would take the same money as buying a new E550, which they don't even make anymore. This is a timeless design and looks way better than the new MB sedans (they all look the same now). I would not buy the new body style MB sedan other than maybe, just maybe the S-class with AMG body inserts.
I must be a stupid man to install a $500+ sensor in a car that has kbb value of $3000 - $4500, but to get a car with options and quality like my car would take the same money as buying a new E550, which they don't even make anymore. This is a timeless design and looks way better than the new MB sedans (they all look the same now). I would not buy the new body style MB sedan other than maybe, just maybe the S-class with AMG body inserts.
The following 2 users liked this post by Arrie:
BenzV12 (06-15-2024),
pierrejoliat (06-15-2024)
#14
MBWorld Fanatic!
Yeah,
I must be a stupid man to install a $500+ sensor in a car that has kbb value of $3000 - $4500, but to get a car with options and quality like my car would take the same money as buying a new E550, which they don't even make anymore. This is a timeless design and looks way better than the new MB sedans (they all look the same now). I would not buy the new body style MB sedan other than maybe, just maybe the S-class with AMG body inserts.
I must be a stupid man to install a $500+ sensor in a car that has kbb value of $3000 - $4500, but to get a car with options and quality like my car would take the same money as buying a new E550, which they don't even make anymore. This is a timeless design and looks way better than the new MB sedans (they all look the same now). I would not buy the new body style MB sedan other than maybe, just maybe the S-class with AMG body inserts.
It's a nice thing you're still with your W212
The following users liked this post:
CaliBenzDriver (06-18-2024)
#15
MBWorld Fanatic!
Thread Starter
I also have a 221. That car is the best looking MB sedan they ever made.
#16
MBWorld Fanatic!
The following users liked this post:
CaliBenzDriver (06-18-2024)
#17
MBWorld Fanatic!
Thread Starter
I know I'm really not stupid but some people going just by like kbb would think they could by my car for that kbb value. I don't think I would let it go for $15 000.
In perfect condition, everything works (fully loaded other than night view I don't have) and the best-looking E-class with those hockey stick DRLs they ever made.
Thiis car is a classic design that never goes old. New ones with the round corners look stupid including the S-class.