My W126 (1988) has been setting quite a bit lately, but I have been starting it and letting it run for about 10-15 minutes per week and moving it about the driveway, but on Sunday afternoon I turned on the HVAC and the blower has started squeaking. It does not squeak at first, but after a few seconds, it will start to squeal and sounds like it slows down.

Is there a repair procedure by lubing the wheel or motor or does something have to be replaced?

Thanks.

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2004 Toyota Sequoia Limited 4wd
1991 Lincoln Town Car Executive
1991 Cadillac Sedan DeVille
1988 Mercedes 300SEL
1972 Chevrolet Caprice Kingswood Estate 9-passenger wagon
1973 Pontiac Grand Ville
(Prior MB's: 1974 240D, 1985 380SE, 1984 190D, 1993 400SEL)

Is there something inside the blower? My w123 has similar blower and something was inside catching......

Maybe a mouse or a mouse nest? The car has not been driven on the road over the last several months, but I have been starting it up every week or so and let it run for awhile and move it about the driveway, but never turned on the blower. I thought it was from lack of use.

I guess I will just have to remove the panel and see what is going on. Must be an uncommon issue.

If the blower is squealing the only real culprit is the motor bearings. If you stopped it as soon as it started squealing you can very likely save it just with some oil dribbled on the bearings (use Zoom oil for best results). If you've been running it with it squealing anyway, the bearings are ruined by this point and you'll need a motor.

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Easy to R&R it and about $80 for a Bosch motor. Reuse your blower cage. Can probably swap in an hour.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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