Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 07-30-2001, 11:56 PM
Registered User
Join Date: Dec 2000
Location: Montgomery, Alabama USA
Posts: 61
Fan trouble again --- help please

I recently replaced the radiator (cracked), thermostat (stuck), and aux fuse (blown) due to overheating problem. This fixed it I thought, but today temp creeped up and aux fans never came on. Later they worked fine, but them stopped working again. The fuse is ok this time.

Does anyone know what all is in the circuit that controls the fans? My manual doesn't show the fans in the wiring diagram for some reason. Is there a resistor and/or a relay? I assume there are 2 sensors and I think that I can find these but I don't know what else.

Ken Fuller
1990 300E
Reply With Quote
Old 07-31-2001, 06:49 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
You really need to go to the PartsShop here and purchase the 124 CD Rom set. I has ALL of the wiring diagrams for your car!!! The diagrams are the best part of the CD's!!!!!

You probably only have the fans working on the high setting. You need the low to work when the A/C is on.

Good luck
Donnie Drummonds
Reply With Quote
Old 08-01-2001, 12:06 AM
MikeTangas's Avatar
Senior Member
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
The fan should show in the diagram as a circle with an "M" inside - signifying a motor. Trace out the line from the thermo switch and it will lead you through a relay (possibly a 5 pin) and out to a circle M.

Keep in mind there are several circle M's; fuel pump, blower motor, starter just to name a few.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon least its a diesel

Non illegitemae carborundum.
Reply With Quote
Old 08-01-2001, 04:17 PM
K Juul
Posts: n/a
Just a thought, but are you sure you bleed the cooling system well. An air bubble will cause overheating and if it happens to be in the area of the temp sensor the fans won't come on. I second the praise of the CDs. They have answered many a question for me.

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
M119 Viscous Fan mod & problems with aux. fan resistor-mod ke6dcj Mercedes-Benz Performance Paddock 92 05-19-2010 10:36 AM
DIY Notes may help people: Radiator, Fan Clutch, Temp Sensors, Fuel Pump, Temp Gauge ericgr Mercedes-Benz SL Discussion Forum 3 09-24-2004 01:40 AM
Noisy Fan/ 180E / 190E/ Air Conditioning problem cowiepeters Tech Help 1 03-29-2004 02:34 AM
Viscous coupled fan for M102 possibility? Greg in Oz Tech Help 0 05-26-2003 04:09 AM
Fan and pulley trouble BenzoX Tech Help 14 06-06-2001 11:49 PM

All times are GMT -4. The time now is 07:02 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page