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COLLISION PREVENTION ASSIST NOT SHOWING AMONGST DRIVEASSIST OPTIONS
Hello everyone
i have a w212 2014 that’s meant to have the collision prevention assist plus feature (i know cause i looked up VIN and also had a technician check with xentry)
when i start the car, the red triangle lights comes on for a second as well (alongside all the other dashboard lights which is normal when you start a car)
When i investigated why it wasn’t showing under drive assist, they said the module was bad and i had to get a new one.
SCN coding was done after installing the new one.
The technician mentioned the feature was initially deactivated before i bought the car and he had to re-activate it.
could this be why I’m not seeing it in drive assist or atleast seeing “COLLISION PREVENTION ASSIST INOPERATIVE”?
before changing the module, i used to have “PRE-SAFE FUNCTIONS LIMITED” though
After SCN coding & reactivating, the technician told me to drive around for a bit before it would start working. It’s been 5 days and I’ve been driving long distances .
i took it back to the technician couple of times and he showed me the adjustment (or adaptation, I’ve forgotten what he called it) was at 99%. (It was previously at 90%, then 96% 3 days ago, then as at yesterday 99%).
how long do i need to drive for it to start working and what conditions or criteria do i need to meet while driving?
currently under drive assist, i only see “Assist. graphic, ESP, ATTENTION ASSIST.
Last edited by Ad8kunle; Jul 27, 2025 at 11:30 AM.
Hello everyone
i have a w212 2014 that’s meant to have the collision prevention assist plus feature (i know cause i looked up VIN and also had a technician check with xentry)
when i start the car, the red triangle lights comes on for a second as well (alongside all the other dashboard lights which is normal when you start a car)
When i investigated why it wasn’t showing under drive assist, they said the module was bad and i had to get a new one.
SCN coding was done after installing the new one.
The technician mentioned the feature was initially deactivated before i bought the car and he had to re-activate it.
could this be why I’m not seeing it in drive assist or atleast seeing “COLLISION PREVENTION ASSIST INOPERATIVE”?
before changing the module, i used to have “PRE-SAFE FUNCTIONS LIMITED” though
After SCN coding & reactivating, the technician told me to drive around for a bit before it would start working. It’s been 5 days and I’ve been driving long distances .
i took it back to the technician couple of times and he showed me the adjustment (or adaptation, I’ve forgotten what he called it) was at 99%. (It was previously at 90%, then 96% 3 days ago, then as at yesterday 99%).
how long do i need to drive for it to start working and what conditions or criteria do i need to meet while driving?
currently under drive assist, i only see “Assist. graphic, ESP, ATTENTION ASSIST.
You've paid good money to have this system worked on. Let the specialist see that the repair works.
Here are the IC Options I have available... DRIVE-ASSIST: 1/2 menu entries
DRIVE-ASSIST : 2/2 entries
Collision assist is a quick coordinated reaction of safety module, not so much pretty display animation. It's more like a simplistic IC Graph + Beep-Beep warnings :
independant braking
self-steering
seats highspeed travel
steering column tilt
seatbelt tensioners
headrest
(misc. SRS airbags)
ECU/TCU off
pyrotechnic power cutoff
mBrace SAT. geolocation + Emcy call
Crash-prevention sensors data retrieved from
Microwave Front/Rear radars
G-forces acceleration/deceleration/rotation
steering angle
wheel speeds
...
Last edited by CaliBenzDriver; Jul 27, 2025 at 02:10 PM.
FCW is only a primitive function on cars that do have DTR - Distronic
It's just a warning and only brake on a imminent impact.
Is this the case?
When i run a VIN check, i see I have COLLSN. WARN. SYS W/ ACTIVE BRAKE INTERV. FCW STOP but it doesn’t work
These are the only options under DriveAssist
the red triangle lights also doesn’t light up or beep in dangerous situations.
I have had it checked out, replaced the module and done SCN coding.
my complaint here is, how long am i meant to drive for before it fully adapts cause its been 5 days now.
when i took it back to the technician yesterday, it was 99% then. They said when it hits 100% it will engage automatically
I’ve driven long distances since then and its still not activated
You've paid good money to have this system worked on. Let the specialist see that the repair works.
Here are the IC Options I have available... DRIVE-ASSIST: 1/2 menu entries
DRIVE-ASSIST : 2/2 entries
Collision assist is a quick coordinated reaction of safety module, not so much pretty display animation. It's more like a simplistic IC Graph + Beep-Beep warnings :
independant braking
self-steering
seats highspeed travel
steering column tilt
seatbelt tensioners
headrest
(misc. SRS airbags)
ECU/TCU off
pyrotechnic power cutoff
mBrace SAT. geolocation + Emcy call
Crash-prevention sensors data retrieved from
Microwave Front/Rear radars
G-forces acceleration/deceleration/rotation
steering angle
wheel speeds
...
Thanks for your response, this is mine.
i assumed Collision prevention assist or distance warning will also be listed there
Thanks for your response, this is mine.
i assumed Collision prevention assist or distance warning will also be listed there
so that's a wrong assumption.
What you're saying TOTALLY MAKES SENSE but not to MB engineers.
CPA has no user options, it is always ON, period!
SO YOU KNOW....
-- if you dislike the "belt self-tightening" each time you start the engine, disable the function but the item will not be called during Emcy.
-- Same limitation with the convenient-entry, once disabled column won't move in Emcy.
Last edited by CaliBenzDriver; Jul 27, 2025 at 05:17 PM.
When i run a VIN check, i see I have COLLSN. WARN. SYS W/ ACTIVE BRAKE INTERV. FCW STOP but it doesn’t work
These are the only options under DriveAssist
the red triangle lights also doesn’t light up or beep in dangerous situations.
I have had it checked out, replaced the module and done SCN coding.
my complaint here is, how long am i meant to drive for before it fully adapts cause its been 5 days now.
when i took it back to the technician yesterday, it was 99% then. They said when it hits 100% it will engage automatically
I’ve driven long distances since then and its still not activated
Do you have Xentry, Vediamo, stuff? Sometimes it needs to activate the function after some unsuccessful SCN attempts.
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