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Old 03-01-2012, 10:53 AM
Registered User
Join Date: Jul 2010
Location: Naples, FL
Posts: 20
AC blower issue

I have a 96 s320 with an ac issue. If the blower is on high or low it works fine. If you select auto it runs on high for a few seconds then switches to the low fan setting even though the display still shows the high setting. even if you manually increase the fan speed it stays on low. Is this a bad ac control unit?
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Old 03-01-2012, 11:22 AM
Registered User
Join Date: Nov 2006
Location: Dubai, UAE
Posts: 168
No it is the blower motor regulator, common failure point on that car. You can sometimes source the regulator without the motor.

Had the same issue with our 98 S500
2001 G500 (45k and counting)
1991 350SDL (211 and counting)
1998 C43 (50k) Silver/Black (sold)
1995 E500 (40k and counting) Pearl Black/Anthracite (sold)
1991 300CE (50k and counting) Silver/Black Cloth (sold)
1983 300D - 79k Classic White/Blue Leather
2002 E55 Obsidian Black/Black
1996 S600 Coupe - 75k Black/Black (traded)
1984 300D -145k (sold)
Silver Blue Metallic/ Blue Leather
1985 300D - 87k (sold)
Manganese Brown/ Palomino Leather
2005 E55, 50k(sold)
Flint Gray/Black
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