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 01-26-2001, 02:05 AM
Posts: n/a
Thanks to one and all here for a great forum...
I just bought my 96 E-320 (73K Miles). Car came from Canada origianlly. First thing I did was take it in to the non Mercedes dealer Mercedes car people here in Birmingham Al. to go over it and fluid changes (I live in an apartment complex so dont really have a place to do it myself). During the service the belt needed replacement and we found slack in the water pump shaft...although there were no coolant/seal leaks, I elected to replace the pump. In process of all of this the question of temp and cooling fans came up. The temp (gauge in Centigrade) would run around 80 C on the road... in traffic would go up to around 105-110 C with the air conditioner on. Replaced the 85C thermostat with a 75 C thermostat (further south than Canada) at the recommendation of the shop. Question is since this is a Canadian car, should the cooling fan circuit be reset to come on at a lower temp?? Cooling fans come on around 110 C. I was concerned that maybe there was something wrong with the fans and/or circuit controlling the fans (they dont run all the time with the air conditioner on). The shop could not find schematics covering the 4 wire temp sensor that screws into the thermostat gallery on the top of the water pump. Also the fan appears to be variable speed using pulsating DC to control the speed. Additionally the screw in sensor unit appears to be a pair of thermistors rather than switches (I measured the resistance with an ohmmeter)
Since we cant find any literature on this (I would guess since the E is Canadian and different in some ways from the ones imported into the US) Id really appreciate thoughts on the whole cooling fan thing-- where should they switch on and/or off and is this settable?? If so should they be set to switch on at a lower temp(further south and much warmer summers). Is my supposition that the screw in sensor is in fact thermistors??
Thanks to all here for a great place for technical info !

Carr McCormack
Birmingham Al

Reply With Quote
Old 01-26-2001, 04:49 PM
Ali Al-Chalabi's Avatar
Senior Member
Join Date: Nov 2000
Location: Knoxville, TN
Posts: 1,837
The fan clutch should lock the engine driven fan by around 100C. The electric aux fans located in front of the radiator should cycle on and off with the air conditioner when the pressure gets too high. They only go on high speed when the engine reaches a temp of 110C or so according to US specs. I also believe the stock temp of thermostat is around 87C in the US. Your temp sounds about normal.
Reply With Quote
Old 01-28-2001, 11:12 AM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
The auxillary fans are famous for failing on this.

I have replaced a clogged radiator or two.
Donnie Drummonds
Reply With Quote
Old 01-28-2001, 04:04 PM
J.HIDALGO's Avatar
Registered User
Join Date: Jul 1999
Location: Jax, FL
Posts: 1,785
I noticed your 300D. Did you just acquired it? I think you were talking about getting it...How do you like it?

'86 300E
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
HELP - Cooling System W126 bisric Diesel Discussion 2 05-09-2004 11:14 AM
Pressure in cooling System pberku Diesel Discussion 10 01-23-2004 01:26 PM
97 C230--Electric cooling fan questions rpmillie Tech Help 0 06-24-2002 01:51 PM
Cooling system leakage Chris17H Tech Help 0 05-31-2002 04:16 PM
82 300D cooling problems DIESEL Diesel Discussion 6 05-03-2002 12:47 AM

All times are GMT -4. The time now is 03:11 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page