Found a vacuum hose that was cut and leaking - cut the end off with scissors and stuck it back on but no change to the gauge.

At idle and you step on the brakes, the gauge moves to the right, but when I take my foot off, the gauge doesn't move right back - anyone know what gives? Is the vacuum vented to the air when you remove your foot? Why won't the gauge move again?

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1991 300 SEL
218,000 Km

"Xsbank's rules of mechanical intervention: Always go for the easiest solution first; 90% of what ails a gasoline engine is ignition; After that its all a WAG."