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Old 06-09-2012, 06:18 PM
JamesDean's Avatar
Electrical Engineer
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,034
300SD Auxiliary Fan Replacement Options

Hello everyone,

I was working on my one 82 300SD today when the aux fan kicked on and sucked in one of my blue shop towels. The fuse blew but not before the fan lost a blade.

I've got a 420SEL single fan and a 560SEL double fan setup available. Will either of these fit on the 300SD? Someone told me the later SD's got a bigger fan...


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82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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Old 06-10-2012, 12:14 AM
vstech's Avatar
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,419
I think the gasser's front crossmember is slightly larger, but take some pics of their front, and compare it to yours.
I'm pretty sure the front crossmember (radiator support shroud... whatever the tin behind the bumper is called...) on the 82 is flat, and on the later years, they thinned it and put a large droop in there to give clearance to the fan.
I can take a pic of the 82 I have in my shop and compare it to my 85 for you.
the 85 CERTAINLY has a larger fan than my 82... around 16 inches...
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
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1987 300TD
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Old 06-10-2012, 03:16 AM
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
I fitted the larger single fan onto the SD without much ado. Had to drill the top crossmember IIRC. Hopefully, you have the steel mounting bracket with the single fan.
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Old 06-10-2012, 12:25 PM
Registered User
Join Date: May 2006
Location: Old Town, Fl
Posts: 350
I installed one from a 420 in my 82 SD. If I recall I had to use the tubular support bar from the 420 as well. (different angle = different length)

82 300SD 202K
82 300SD 233K
83 300TD 340K
82 300TD 98k euro (parts on the hoof)
85 300TD 282K
83 300TD 197K
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