S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

Fun Fact: w215/e350/e55 amg blower motor+fan fit the 560sec (small modifications)

Old Mar 13, 2026 | 09:08 PM
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From: Fort Worth
2005 CL55 AMG || 2005 CL65 AMG || 1989 560SEC
Fun Fact: w215/e350/e55 amg blower motor+fan fit the 560sec (small modifications)

I've had an '89 560sec for a couple months, and have been fixing a few things, HVAC being one.
The factory blower fan kind of sucked so I disassembled/cleaned/lubed it, and now it sucks and is loud.

Parallel to this occurring my blower in one of my w215's quit working. Seemed like the voltage regulator. Bought a used fan and regulator from an e350 for cheap.... Motors look very similar?

They are, same diameter motor (mostly, bottom 1/3rd of w126's is maybe 1/8" smaller diameter), years newer. Blower blades look IDENTICAL. Motor fits right in if you dremel about a 7/8 width channel through the w126's blower motor center sleeve/mount thing, and make the inside of the cylinder all smooth (1/8" smaller diameter of lower part of motor= a couple random pieces of plastic to fill the gaps). Retaining screw fits right in too! I went in after the fact with a couple giant zipties to snug the now-cut center support to the motor. Couple spade connectors, viola.

Fan blows hard and is quiet.

W215 is probably a bad connection point, after additional revelations.
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