On my 1987 300e the vacuum gauge is stuck on the left, in the black. When I had the cluster out a while ago, I did feel vacuum suction on the black rubber hose. Does that suggest my gauge is toast?

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)