[Plays with cars]

Very cool! I bought something similar from MercedesSource.com earlier this year. I wasn't as successful cleaning injectors though. I had 11 that I had collected over time but I was only able to save 5. Five, not being the six I needed for the engine, I ended up buying six new injectors (gulp. But I've been chasing ghosts for a couple of years on this project and needed to ELIMINATE possible failure modes).

Anyway, when I received the new injectors I ran all of them through the tester and found that one of the new ones was no good. It leaked a little bit and the crack pressure was too low. I was able to exchange it for a replacement that tested fine. The tester definitely paid for itself by identifying the bad used injectors and the one bad new one.