In the attached picture, is the device circled in yellow with MOT on the top the purge valve or "regeneration switchover valve" as the service cd calls it? On my '00 E320 you can here this device ticking and can feel it pulsating very easily. On the '94 I have never heard it or been able to feel it working. If it is what i think it is I know it deals with fuel vapor. What issues might I have if it doesn't work?

Thanks

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'94 E320 with 272,000 miles. '92 500SEL 133,000 miles.
Mods to the '94: TomTom GPS in place of ash tray, Auto Dimming Mirror ,Memory seat, DEI 545T Auto lamps, DEI 530T Auto Up/Down Windows, DEI Remote Start, Motorola Bluetooth® Car Kit, Built in phone charger using factory phone wiring, RainTracker Rain sensing wiper, Keyless Entry, Ambient lighting of center storage compartment. Soon: factory heated seats, REST
Mercedes-Benz is my addiction of choice.
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