I just spoke to a local Mercedes mechanic (non-dealership shop) about rebuilding the center-vent vacuum-controlled actuator in my 260E. This is a common issue in the W124-bodied cars.

The way most people get to this involves completely removing the dashboard, etc, etc.

His way of doing this is different:
Cut open the plastic heater box! He says he has done this many times and simply glues it shut.

Anyone ever heard of this or done it? What a colossal cost-saver!

Interested in replies!

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-Steve