W204 retrofitted interior airbag woes

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robonmac

New Member
Joined
Sep 29, 2014
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10
Car
C Class 250 CDI estate
Well,most people wouldn't attempt this but I'm a pig headed bugger so I attempted to fit the 2013 black artico/alcantara red stitched interior from a saloon into a 2010 estate!!
Obviously the fronts were a doddle but converting a saloon split fold into an estate rear fold was an absolute swine and I really should of photographed it for a sticky but given the problems I had I don't think any body would of bothered to read it.
Anyway it's all in and looks spot on and doesn't have any of the pathetic splits and cracks of the old seats.
My problem is that the front airbag malfunction warnings are on both left and right as is the airbag light near the warning triangle light in the middle of the main console.
I had a feeling this would happen and given that I didn't know the history of the new interior I swapped all of the old seat airbags with the newer ones and also the seat belt buckles too.
Unsurprisingly they are still on so I booked it in to an independent in manchester called master tech.he has reported back that there is a fault with the steering wheel airbag but not the seats???
Again,I'm not overly surprised because recently I retrofitted a w207 flat bottomed wheel utilising the old airbag(trust me this can be done without any fit issues) .
The garage charged me for investigating the faults but vague about these issues and I feel like it's an attempt to get it booked in for more analysis??
Anyway I've since purchased the icarsoft i980 diagnostic reader to see if I could erase the airbag codes but it won't read the srs module saying it cannot communicate with the ecu?
I've performed the updates but it's still the same.
Has anyone had any experience with this gizmo and had similar issues?
Can a garage "disable" a function so I can't read it myself or am I being paranoid.
Does anyone know of someone who can erase these codes in the Manchester area and do a bit of delving?
I'm prepared to travel,possibly within 50 miles on weekends.
Any help would be much appreciated.
 
Can't help with an indie recommendation in your area (unless you want to drive down to MSL in Birmingham), but yes you need to take the car to an MB specialist who will have MB STAR diagnostic computer. The icarsoft i980 should be bale to communicate with the SRS ECU (my Autel does), but I think you are paranoid :D and it's more likely there's an issue with the code scanner or with support for your model etc. But even if it does connect, it can't be relied upon in the same way that you could with proper MB STAR. As for SRS faults, these can occur if the ignition is turned-on while any of the SRS wires or connectors are disconnected or unplugged, and in this case you will need to erase the fault codes first and see if they come back (not sure if the garage did that). If they do come back, then this can be faulty connector almost anywhere really - I had the SRS light come on after replacing the steering wheel angle sensor (which is in fact a component of the ESP, not the SRS), and it turned-out that one of the pins on the new angle sensor connector deep under the steering wheel was bent.
 
Thanks for the reply,the garage said that they were not prepared to erase fault codes with airbags as it may be deemed unsafe to let a vehicle go that potentially had a fault,make of that what you will.
I'm glad the angle sensor isn't affected by srs system because I can at least rule that side of it out.
 
What I meant was that in spite of the fact that you wouldn't expect an issue with the angle sensor plug to have any effect on the SRS system, in my case it did, and it caused the SRS warning to go off until the faulty connector was fixed.

What I am trying to say is that really any loose or bad connection in the steering wheel area can cause an SRS fault, i.e. it is not necessarily caused by a component that we would normally associate with the SRS system.

As for deleting SRS codes... I have often seen garages do that, so I assume its standard practice, but obviously I am not a professional mechanic so no idea if it's OK to do so or not.
 
Ask the guys at command online
 
I did some work on my front seats recently which meant disconnecting them, when I refitted them the warning light came on. I took it to a garage I have always dealt for a reset and even though we are friends, the owner was very clearly unhappy about the reasons for the reset until I reassured him and showed him the repairs.
I guess it's down to good practice.
 
If there is a problem with a steering wheel airbag does it show the same warning message as a seat airbag on the dash in a w204
 
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If there is a problem with a steering wheel airbag does it show the same warning message as a seat airbag on the dash in a w204

On my W203, it just shows 'SRS fault', and I then need to use a code reader to check which component flagged up the error code.

This was the case when the Front Passenger Seat Occupancy Sensor failed, and when the Steering Wheel Angle Sensor pins were bent.

So if the W204 is the same as the W203, then the answer is 'yes'.
 

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