Rear seats belts warning
07-31-2009, 08:27 PM
#1
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Rear seats belts warning
Is there a rear seat belt warning or not? If not, can it be activated via a software tweak?
07-31-2009, 08:54 PM
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'15 S550 4matic; '10 RX350; '14 E350 Cabriolet
08-01-2009, 01:41 AM
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The face lift would likely have an indicator because the 204 tells at the cluster if rear seat belts are engaged. The 212 even shows which ones are engaged. But neither one gives a warning tone if the passenger does not fasten the belt. I guess there are still too many countries where seat belts are not mandatory or passengers just don't use them.
08-01-2009, 02:34 AM
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E350
The face lift would likely have an indicator because the 204 tells at the cluster if rear seat belts are engaged. The 212 even shows which ones are engaged. But neither one gives a warning tone if the passenger does not fasten the belt. I guess there are still too many countries where seat belts are not mandatory or passengers just don't use them.
Exactly. In many countries, the REAR seatbelts are optional (and in some countries ANY seatbelt is optional). It would be extra work for MB to create different seatbelt sensors, wiring configurations, computer software to handle the extra 2 sensors (or 3 if you count the middle seat), and indicator lights and install them in different cars sent to different countries. And what if there aren't passengers in the rear seat(s)? That means MB has to install passenger sensors to sense if passengers are in those seats as well. MB (as most other car manufacturer) is in the process of reducing costs, not increasing them...
Last edited by chokaay; 08-01-2009 at 02:36 AM.
08-02-2009, 10:34 AM
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The face lift would likely have an indicator because the 204 tells at the cluster if rear seat belts are engaged. The 212 even shows which ones are engaged. But neither one gives a warning tone if the passenger does not fasten the belt. I guess there are still too many countries where seat belts are not mandatory or passengers just don't use them.
Yeah, right, there should be a warning light somewhere on the headliner as in a airplane.. S-Class is like a small private jet after all
08-02-2009, 10:34 AM
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08-02-2009, 10:38 AM
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Exactly. In many countries, the REAR seatbelts are optional (and in some countries ANY seatbelt is optional). It would be extra work for MB to create different seatbelt sensors, wiring configurations, computer software to handle the extra 2 sensors (or 3 if you count the middle seat), and indicator lights and install them in different cars sent to different countries. And what if there aren't passengers in the rear seat(s)? That means MB has to install passenger sensors to sense if passengers are in those seats as well. MB (as most other car manufacturer) is in the process of reducing costs, not increasing them...
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08-02-2009, 10:41 AM
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It isn't from weight on the seats but from the seatbelts attached. The car has the HW to indicate the driver that seatbelts are attached but currently it does not know if someone is sitting at the back seat.
08-02-2009, 10:46 AM
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How do you explain this?
08-02-2009, 03:04 PM
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You say the seat belt is always fixed, do you mean the headrest does not raise when you start the car and drive if there is no baby (weight) at the seat?
Edited: EPC does not indicate any parts changes for the rear seat and no weight sensing element at the seat bench:
http://partscatalog.ru/mercedes/1/ca...186/63V/92/035
The above is for three rear seats but the two seat option looks the same. The only electrical wiring appears to be heated seats and seat belts (plus the seat adjustments).
But WIS is odd in the sense that the functional description is covered up to model year 08 without anything from that model year onwards, unless I've missed some info. At least up to MY 08 (included) the conditions for the rear head rests raising are: circuit 15 on, either seat belt buckled or actuation of the rear head restraint buttons or the front control button.
Last edited by Diesel Benz; 08-02-2009 at 03:41 PM.
08-02-2009, 04:09 PM
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Your car must be different then. Which MY was your car, I'm going to have a look how that is possible.
You say the seat belt is always fixed, do you mean the headrest does not raise when you start the car and drive if there is no baby (weight) at the seat?
Edited: EPC does not indicate any parts changes for the rear seat and no weight sensing element at the seat bench:
http://partscatalog.ru/mercedes/1/ca...186/63V/92/035
The above is for three rear seats but the two seat option looks the same. The only electrical wiring appears to be heated seats and seat belts (plus the seat adjustments).
But WIS is odd in the sense that the functional description is covered up to model year 08 without anything from that model year onwards, unless I've missed some info. At least up to MY 08 (included) the conditions for the rear head rests raising are: circuit 15 on, either seat belt buckled or actuation of the rear head restraint buttons or the front control button.
You say the seat belt is always fixed, do you mean the headrest does not raise when you start the car and drive if there is no baby (weight) at the seat?
Edited: EPC does not indicate any parts changes for the rear seat and no weight sensing element at the seat bench:
http://partscatalog.ru/mercedes/1/ca...186/63V/92/035
The above is for three rear seats but the two seat option looks the same. The only electrical wiring appears to be heated seats and seat belts (plus the seat adjustments).
But WIS is odd in the sense that the functional description is covered up to model year 08 without anything from that model year onwards, unless I've missed some info. At least up to MY 08 (included) the conditions for the rear head rests raising are: circuit 15 on, either seat belt buckled or actuation of the rear head restraint buttons or the front control button.
It works exactly as you say except for one thing - the headrest comes up even if the seatbelt is not attached (I have to check this to make sure).
I just PMed the VIN to you.
