Heater issue
Thread Starter
Member
Joined: Jan 2014
Posts: 85
Likes: 1
2006 SL500
Heater issue
Has anyone had an issue with the heat in their CLK? Mine is warm but it won’t get hot. It seems that my auxiliary coolant pump is working as well, but a mechanic said it might not be working all of the time? I can plug it in/unplug it and feel a vibration difference. 2006 CLK500
Thread Starter
Member
Joined: Jan 2014
Posts: 85
Likes: 1
2006 SL500
It seems the passenger side defroster will put out hot heat, but the drivers side won’t. When switched to upper vents it blows luke warm. When the blower setting is on low the heat is hot as well, but as you turn it up it seems to cool off. Very odd.
Last edited by 06SL500AMG; Dec 9, 2018 at 05:04 PM.
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
Try the ACC reset/test: Engine running, simultaneously press and hold the FRONT DEFOG and RECIRC buttons until their lights begin to flash. They will continue to flash for 20-30 seconds until the test completes. If they don't stop flashing, then there is a fault (probably a bad damper servo) that needs further diagnostics. Shut the engine off to exit the test. Otherwise, if they stop, then the issue is with the engine cooling system, maybe a bad thermostat.
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
You probably need to read codes from the ACC module. You'll need a tool that can access MBZ's proprietary systems - a generic OBDII scanner won't do it. SDS (Star Diagnosis) is best, or the iCarsoft i980 or MBII, or the Autel MD802 Elite can all do it.
Trending Topics
Junior Member
Joined: Nov 2018
Posts: 73
Likes: 11
From: West Linn, OR
CLK350 2007
I had a bad thermostat a year ago and was able to reach 80 while parked but would go below 80 on the highway. Now (after installing an OE thermostat), the temp gets above the 80 mark parked or on the highway.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
