There is a repair video posted online with Citroën mechanic Adrian Pease showing the process of cleaning the air filter on a DS. The same technique applies to an ID and the SM (though the SM’s air filter is cylindrical). Here’s the link:
![](https://citroenvie.com/wp-content/uploads/2019/07/How-to-Clean-a-DS-Air-Filter-1-video-ss.jpg)
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