SRS Warning Light.

[greyboy]

My 2001 W210 320CDi Estate has had the red "SRS" warning light coming on and off randomly when driving,for the past couple of weeks. This evening on a 4 mile drive it was on all the time. It co-incides with the "air bag off" light on the centre console going on and off too.

Has anyone any ideas what this could be and how it could be fixed ?

 

[Dieselman]

It needs the codes read really but I'd hazard a guess at the passenger seat occupancy sensor or connection.

 

[gt-83]

ive just had a week in wales..............1200 miles.....5 miles from home the srs flashed for a second 300 miles since and it has not repeated?? a one off or does it need checking?

sorry my post looks like ive hijacked original.....didnt mean it that way....but just same topic

 

[pos.k]

I had a similar problem on my 04 facelifted W203. It turned out to be a faulty coil spring contact within the steering wheel. It was apparently a fairly regular problem (at least on the C class). It started off being intermittent, and then became permanent. The reason that the passenger airbag light goes on may be that when a fault is detected in the SRS system it deactivates that system completely
When I found this out I actually put quite a bit of pressure on the stealer to sort it because I was traveling extended distances without airbags, and hence at increased risk.

 

[greyboy]

Just tested the car with and without a passenger. There is no fault at all when driving without a front seat passenger. Shortly after driving off with the front seat occupied the light comes on.

This shows that the passenger seat sensor/connection is quite probably at fault. Thanks Dieselman. I take it they are easily accessible under the seat if it is raised to its highest level.

 

[BlackC55]

The seat base has to come apart. It is DIYable but fiddly.