Idle temp concern - Mercedes Benz SLK Forum

SLK R170 General Discussion SLK 200, SLK 230K, SLK 320, SLK32 AMG

 8Likes
  • 1 Post By Dave2302
  • 2 Post By SLKNESS
  • 2 Post By Australian
  • 1 Post By M4rCu5
  • 1 Post By Pictor
  • 1 Post By SLKNESS
 
LinkBack Thread Tools
#1 Old 05-31-2019
Registered Users
 
Join Date: May 2019
Location: San Diego, CA
Vehicle: 2002 SLK 320
Posts: 14
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
Idle temp concern

Hi all Ive been noticing that when I'm idling at a stop light or parked, the temp in my car runs a little hot. Just above 80c and nearly halfway between the 80c notch and the notch separating 80 and 120c I've heard this is a normal quirk for the r170 v6 but I want to be sure before I dismiss it. When I start driving of course the temp gauge reads right at or just barely below 80c anyone able to give some insight on this please?
SLKNESS is offline  
Sponsored Links
Advertisement
 
#2 Old 05-31-2019
Registered Users
 
Join Date: Nov 2018
Location: NW Scotland
Vehicle: 2002 R170 SLK 320 V6
Other Toys: W220 V8 S Class, W203 CDI C Class, Peugeot Van 2.0 HDI, W220 V8 S Class Parts Donor Car
Posts: 602
Country:
Chats: 0
Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 155 Post(s)
Thanks: 28
Thanked 54 Times in 46 Posts
Hi,

On a hot day, after a good run, let the Car idle when hot and see if the Electric Fan Cuts in, it will start off slow, and not easy to hear.

They are controlled by a PWM Signal from ME ECU, and are programmed to cut in on slow speed at above normal running temp, so it isn't constantly cutting in / out, as are most Cars Cooling Fans.

If temp rises further on MB, the Fan increases in speed incrementally with reference to ECT

HTH, Cheers Dave
M4rCu5 likes this.
Dave2302 is offline  
#3 Old 05-31-2019
Registered Users
 
Join Date: May 2019
Location: San Diego, CA
Vehicle: 2002 SLK 320
Posts: 14
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
Ok great I will check for that. Hopefully it's fine and the cars temp sitting just over 80c is a normal thing for the 2002 SLK 320
M4rCu5 and Dave2302 like this.
SLKNESS is offline  
 
#4 Old 05-31-2019
Premium Member
 
Australian's Avatar
 
Join Date: Sep 2012
Location: South Australia
Vehicle: SLK 320 2002
Other Toys: Just a shopping trolley.
Posts: 493
Country:
Chats: 0
Mentioned: 199 Post(s)
Tagged: 0 Thread(s)
Quoted: 76 Post(s)
Thanks: 8
Thanked 49 Times in 48 Posts
I take the notch between 80 and 120 as 100C. It sounds like yours does exactly the same as mine.
M4rCu5 and Dave2302 like this.
Australian is online now  
#5 Old 05-31-2019
Registered Users
 
Join Date: May 2019
Location: San Diego, CA
Vehicle: 2002 SLK 320
Posts: 14
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
Has yours always done that? I'm thinking it might be a quirk with these model slks since I just topped off the radiator and it still does it

Last edited by jbanks15; 06-01-2019 at 06:20 AM.
SLKNESS is offline  
#6 Old 05-31-2019
Registered Users
 
M4rCu5's Avatar
 
Join Date: Jul 2014
Location: Melton Mowbray
Vehicle: 2001 SLK200K, 2001 SLK320
Posts: 953
Country:
Chats: 0
Mentioned: 52 Post(s)
Tagged: 0 Thread(s)
Quoted: 203 Post(s)
Thanks: 69
Thanked 94 Times in 90 Posts
Garage
Quote:
Originally Posted by SLKNESS View Post
Has yours always done that? I'm thinking it might be a quick with these model slks since I just topped off the radiator and it still does it
Thermostat opens @ 87° so temp anywhere from 85°-115° (weather and forward velocity depending) would appear to be bang on the money, I wouldn't worry about it.

320 'stat
Dave2302 likes this.
M4rCu5 is online now  
#7 Old 06-01-2019
Premium Member
 
Pictor's Avatar
 
Join Date: Jul 2015
Location: Australia
Vehicle: 2001 SLK320
Posts: 1,031
Country:
Chats: 0
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 217 Post(s)
Thanks: 22
Thanked 88 Times in 73 Posts
SLKNESS
Some car manufacturers calibrate their temp gauges to read 1/4 or “normal” or at the first mark above cold,
to convince drivers the cooling system keeps the temp the same always, when in fact it can’t.
They then only let the needle move up when the car is really hot. Turning the temp gauge effectively into an ‘idiot’ light.
It can be argued this is good as drivers don’t worry.

The R170 seems to read true, so it can be a surprise to see it getting warmer some days reading higher and slow to warm up on very cold days.
What does the manual say?
M4rCu5 likes this.
Pictor is offline  
#8 Old 06-01-2019
Registered Users
 
Join Date: May 2019
Location: San Diego, CA
Vehicle: 2002 SLK 320
Posts: 14
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
Thank you everybody for the great feedback. It's all greatly appreciated! I will be consulting the owner's manual and reading up on everything little by little.
M4rCu5 likes this.
SLKNESS is offline  
Sponsored Links
Advertisement
 
Reply

  Lower Navigation
Go Back   Mercedes Benz SLK Forum > Mercedes Benz R170 SLK Class Cars > SLK R170 General Discussion

Bookmarks

Quick Reply
Message:
Options
Upload your files to MEGAUPLOAD
Upload your images to ImageShack

Register Now



In order to be able to post messages on the Mercedes Benz SLK Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 

Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.