Hi all,

I have an interesting cyclic parasitic drawn on my 99 W210 E300TD that I isolated to the PSE (Pneumatic System Equipment pump), my PSE is the one that came with the car. I made a short video that clearly shows the issue
Description:
- Cyclic parasitic drawn from 20ma to 220ma every few seconds

- If I unplug the PSE, drawn remains for that cycle but won't happen again. Drawn is solved by unplugging the PSE

Question:
- Is my PSE bad? Or is whatever is talking to the PSE bad?

Thank you all!