Pulled the motor at the weekend due to constant screeching and was suprised to find that it was not connected to the draw tube which runs from the interior grill (in roof light assy), to the sampler motor.

It appears it has never been connected, although the electrics were, thus the screeching when ignition on (the motor wore out).

Unlike models with ACC fitted, mine has the individual climate control for each front seat passenger - this is manually set and adjusted to suit both driver and passenger individually - one side can be hot and the other ice cold for example.

I'm thinking that there is a likelyhood that the sampler purposely wasn't connected in my version as logic tells us that it would recieve a mixed reading of cabin temperatures if the driver and passenger had differant settings - if you follow my drift.

On the otherhand, with ACC the sampler would be drawing a single temp out of the cabin and be adjusting automatically.

I've run without it connected to the electrics or draw tube today and my aircon is not effected in any way.

Anyone had a similar experience?

The W140 has separate left and right temperature controls and a single cabin temp sensor.

Your car might have two cabin temp sensors (unlikely) and a single aspirator motor to draw air over both of them.

Sixto

i have the same screeching nosie from my blower motor. can you lube or repairt it? is it better for me just to buy a blower replacement?

__________________
93 Toyota Corolla 177K
95 S 500 coupe 82K
92 400E 180K (SOLD)
94 E 420 150, blown gaskets (SOLD)
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You put a drop or two of ATF on the bearing. See how long that lasts.

Sixto
93 300SD

2001 E320 47,000
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Replace it as a temporary fix is just that.