high idle

There are two reason for high idles...

1. Bad idle module... this is verified by doing a MB specified diagnostic procedure and measurement... Simple test is to unplug the air valve wire (not module unit)... if unplugging raises the RPM even higher then see #2.

1. Massive vacuum leak.... most likely is the black vacuum tube... rigid one... on passenger side of the engine. Otherwise, spray carb cleaner to see where engine idle would change (stumbles a bit)

Well I unplugged the 2 wires going to the idle valve, and nothing happened. So I ran 2 wires from the battery to the valve, and the engine dies when I attach the jumper wires, so I think the idle valve is working fine.

If I were to buy a new idle computer, is there a specific one for the Euro model?

Pull the computer out and have the part supplier match the part number.