Why is my mercedes air freshener not working?

The Mercedes air freshener may not be working because it is low and needs a refill, clogged filter, or a climate control error. The Mercedes-Benz Air Balance system is a feature on select models that combines air purification technology with the ability to introduce fragrances directly into the climate control system. Air Balance cleans the air in Your vehicle with a combination of charcoal filters and an ionizer. If You need to refill the purifier You will have to get a razor knife to remove the adhesive around the glass/score bottle so You can easily unscrew the bottle to refill it. Make sure it is empty and clean out the bottle so You can get a fresh scent without remnants of the previous scent.