Monday, February 2, 2015

Mercedes DIY Thermostat Replacement


Replacing a thermostat on your Mercedes vehicle is a job that can be accomplished if you have patience, the right tools, and most of all a step by step video.  This job typically costs $450 - $700 if done by a mechanic (at the time that I wrote this blog).  If you are up for a job that is intermediary in skill set, this is the job for you.

As always, your safety should be the number focus on any vehicle repair especially when it involves working on an engine that is hot, involves moving parts (i.e. electric fan, pulleys, belts)

Safety Rules

  1. Clean flat solid surface (Dirt floors, grass, sloped driveways don't qualify)
  2. Use gloves and goggles to protect your hands and eyes
  3. Work on the engine after it has cooled down.
Tools Needed
  1. Star Wrench set
  2. Socket Wrench and millimeter socket set
  3. Breaker Bar
  4. Container to capture coolant
  5. Hose for coolant nipple on drain plug
Required
  1. Coolant Flush after job is complete
Parts Needed
  1. Thermostat
Procedure and Video
  1. Engage Safety brake and Jack up vehicle - front driver side
  2. Open hood and remove coolant filler cover from reservoir
  3. Remove bottom engine cover 
  4. Place hose on coolant bleed nipple placing the other end into storage container
  5. Open bleed plug
  6. Drain out contents until it is empty
  7. Remove Pulley
  8. Watch the entire process in my YouTube video below





Be sure to subscribe to my you-tube channel for more car repairs and also feel free to post comments and ask questions.  I'll try to respond as quickly as possible.

Copyright info:  All content including the video on YouTube are created and owned by myself.  Please feel free to link to this DIY page and reference my video on YouTube as well.

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10 comments:

  1. JohnMarch 24, 2015 at 8:46 PM

    How do I subscribe to your blog?

    ReplyDelete
  2. JohnMarch 24, 2015 at 8:47 PM

    How do I subscribe to your blog?

    ReplyDelete
    Replies
    1. Keithley R. Sutton Jr.August 25, 2015 at 11:53 AM

      There is a subscribe link at the bottom of this blog.

      Thanks!

      Delete
    2. Keithley R. Sutton Jr.August 25, 2015 at 11:53 AM

      There is a subscribe link at the bottom of this blog.

      Thanks!

      Delete
    3. btyme1April 10, 2022 at 7:54 AM

      when putting in auxlilary battery do you have to reset anything

      Delete
  3. UnknownDecember 22, 2015 at 11:07 AM

    i have a mercedes 2006 C280 and the temp of the engine stay below normal and car does not heat
    may you know what can be

    thanks

    ReplyDelete
    Replies
    1. Keithley R. Sutton Jr.December 24, 2015 at 5:57 AM

      It sounds like your thermostat has gone bad and needs replacement.

      Delete
  4. ElisabetFebruary 5, 2016 at 6:05 PM

    What size was the star bit set that you used to remove the pulley?

    ReplyDelete
  5. UnknownSeptember 26, 2019 at 4:13 AM

    Hack work. Didn't unload the belt tensioner before removing the idler pulley, didn't use silicone grease on the thermostat O-ring or rad hose O-ring, installed idler pulley backwards.

    ReplyDelete
  6. Vett69December 9, 2020 at 5:45 PM

    Hi Keith, I've been watching your channel for a few years now and love it. I have been wanting to get in touch with you about a few questions that I have about my Mercedes Benz c 230 kompressor sport sedan. I have seen the videos of the M class but can you please help me out? I'm a female and am tired of being ripped off and can't find any mechanic that hasn't done that to me. Could you do a video on 2005 Mercedes c230 kompressor sport sedan?

    ReplyDelete

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