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#1
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What's this contraption?
I've asked this question a long time ago but forgot the answer.
On my 300D, passenger fender, a squarish metal cage approx 4" cube (with big round holes for air circulation) with coiled reistance wire inside. Mine got crushed, I unplugged it and nothing seems to have been affected. What does it do? Does the 83 240D have the same contraption?
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#2
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That's the resistor pack for the climate control blower.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#3
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Many other manufacturers have used the same design idea, but most made the install location within an air duct for cooling the hot coils. Mercedes is the only manufacturer that I have seen install this component in the engine bay.
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83 300TD (need rear wiper assembly dead or alive) 84 300SD Daily driver 85 300TD almost 400k miles and driven daily. 98 E300D *sold 86 300SDL *sold and made flawless 10 hour journey to new home. |
#4
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"Mine got crushed"
I've got a couple spares if you need one.
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1981 300TD "The Green Lantern" 1980 300TD 1983 300D Euro "China Cat" |
#5
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Then it must be for low speed because the blower works.when I push the fan button above automatic button on the ACC panel. Only the case is crushed, I'm gonna check it for continuity and short to ground and see if it's still good.
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#6
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The button above the "AUTO" button is high speed, which doesn't use the resistors. With the resistors unplugged, the lower speeds won't work.
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#7
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Slightly OT: Is there a way to get the blower motor to run faster by replacing this resistor pack with a different one? Anybody has done this before?
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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg |
#8
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Id imagine MAX blower speed just bypasses the resistors.
BTW, im not sure but I think having the blower on low actually drains more current from the battery than having it on high or medium since it uses a giant resistor. I put my hand on one once last winter and burnt my hand pretty bad.
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1981 300SD 512k OM603 |
#9
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I straightened the crushed metal cover of the resistor pack and per ohmmeter there's continuity on all the pins. I plugged it back in and there's no change. How many speeds on the blower below high speed and how do I select them? There's an auto button in the middle. What's the button on the bottom?
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#10
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__________________
Jimmy L. '05 Acura TL 6MT 2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China" Scar engine installed '81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John |
#11
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So, it's 2 speed high and low only? Then why does the resistor pack have so many terminals?
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#12
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There are something like six different blower speeds, but only high and low are manually selectable. ATC sucks.
__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. |
#13
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On a W123 you very seldom see more than 3 speeds. High, which just heats up the evaporator and makes your AC temp warmer, low which on some cars barely comes out of the vents, and "auto" which seems to be one step below high. The other speeds rarely if ever come into play.....
__________________
Jimmy L. '05 Acura TL 6MT 2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China" Scar engine installed '81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John |
#14
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bad blower resistor?
Can a bad or failing blower motor resistor cause and increased voltage drain on the charging system? I have a low charging situation on my 1986 190e 2.3-16v and the drain gets much worse when the blower motor is on medium or high. I know it should increase at the motor speed increases but the volt meter is registering below 9.5 volts.
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Christopher Henkel 1990 190E 2.6 - Arctic white SOLD 1986 190E-16v - Blauswartze 1993 300CE - SOLD 2003 W208 CLK 320 Cabriolet - Magma Red |
#15
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Quote:
__________________
85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
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