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1989 300SE 247k+ miles
4,759 Posts
Discussion Starter · #1 ·
Hell All,

This regards my 1989 300SE with 235k miles. I went to pull my mono-valve today, and I have this sitting on top of it. It’s obviously electrical, what with the plugs and all. And it’s number 1 - 8.

But what is it? And what does it do? And should the red light be on when the key is in position II (dash lights stay on and climate control fan runs)? Also, if it’s a factor, I did have the mono-valve unplugged as well.
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