Hi there,
Some time ago I had an opportunity to tinker a bit around my friends Mercedes, he had problems with fuel pomp and it turned out that the problem is in "fuel pomp relay". I opened it up and found out a problem which is really easy to fix. I would like to share this solution. I know it's not directly connected with ecodriving and ecomodding, but i think that saving some money on a new relay is also worth to mention.
Here it is
electronics engineering notes: How to fix Mercedes W201 180 fuel pump controller (so called relay)
feel free to comment
regards