# Service bulletin LI83.20\-P\-051802 A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned. - Type: Service bulletin - NHTSA id: 11017039 - Published by NHTSA: 2025\-04\-15 - Manufacturer's number: LI83.20\-P\-051802 - Manufacturer's date: 2025\-04\-01 - NHTSA component: ENGINE ## NHTSA's summary Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir \(not visible\), reducing the coolant flow in the heater heat exchanger \(see picture\). Remedy With the aforementioned complaint, make sure that the cooling circuit is inspected for silicate residues after all standard tests are completed. The silicate residues tend to accumulate upstream of the shutoff valve for the heater hot water pulsed valve. If there are silicate residues in the coolant, the engine must be flushed thoroughly. To make sure that all silicate residues are removed from the cooling circuit, the following parts must also be replaced \(cleaning of these components is not sufficient\): Coolant expansion reservoir, radiator, oil/water heat exchanger \(oil cooler\), heater valve, heat exchanger of heater, coolant and, if installed, the electric water pump for the residual heat utilization system. Determine the parts for the respective vehicle in the EPC. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11017039-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11017039-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Engine ## Vehicles listed - 2008 MERCEDES BENZ AMG CLK63 - 2001 to 2007 MERCEDES BENZ C230 - 2001 to 2005 MERCEDES BENZ C240 - 2006 to 2007 MERCEDES BENZ C280 - 2008 to 2009 MERCEDES BENZ C300 - 2001 to 2006 MERCEDES BENZ C320 - 2006 to 2009 MERCEDES BENZ C350 - 2008 to 2009 MERCEDES BENZ C63 - 2009 MERCEDES BENZ C63 AMG - 2007 to 2009 MERCEDES BENZ CL550 - 2007 to 2009 MERCEDES BENZ CL600 - 2008 to 2009 MERCEDES BENZ CL63 - 2008 to 2009 MERCEDES BENZ CL65 - 2001 to 2003 MERCEDES BENZ CLK320 - 2006 to 2009 MERCEDES BENZ CLK320 - 2006 to 2009 MERCEDES BENZ CLK350 - 2002 to 2003 MERCEDES BENZ CLK430 - 2003 MERCEDES BENZ CLK500 - 2005 to 2009 MERCEDES BENZ CLK500 - 2005 to 2009 MERCEDES BENZ CLK55 - 2007 to 2009 MERCEDES BENZ CLK550 - 2007 MERCEDES BENZ CLK63 - 2006 to 2009 MERCEDES BENZ CLS500 - 2007 to 2009 MERCEDES BENZ CLS55 - 2006 to 2009 MERCEDES BENZ CLS550 - 2006 MERCEDES BENZ CLS63 - 2001 to 2002 MERCEDES BENZ E300 - 2001 to 2009 MERCEDES BENZ E320 - 2001 to 2002 MERCEDES BENZ E430 - 2003 to 2006 MERCEDES BENZ E500 - 2002 MERCEDES BENZ E55 - 2007 to 2009 MERCEDES BENZ E550 - 2001 to 2003 MERCEDES BENZ ML320 - 2005 to 2009 MERCEDES BENZ ML320 - 2001 MERCEDES BENZ ML350 - 2003 to 2009 MERCEDES BENZ ML350 - 2001 MERCEDES BENZ ML430 - 2002 to 2009 MERCEDES BENZ ML500 - 2001 to 2003 MERCEDES BENZ ML55 - 2005 to 2009 MERCEDES BENZ ML550 - 2005 to 2009 MERCEDES BENZ ML63 - 2005 to 2009 MERCEDES BENZ R320 - 2005 to 2009 MERCEDES BENZ R500 - 2005 to 2009 MERCEDES BENZ R63 - 2005 to 2006 MERCEDES BENZ S350 - 2001 to 2007 MERCEDES BENZ S430 - 2001 to 2007 MERCEDES BENZ S500 - 2002 to 2007 MERCEDES BENZ S55 - 2001 MERCEDES BENZ S55 AMG - 2005 to 2008 MERCEDES BENZ S550 - 2001 to 2009 MERCEDES BENZ S600 - 2007 to 2009 MERCEDES BENZ S63 - 2005 to 2009 MERCEDES BENZ S65 - 2012 MERCEDES BENZ SLK - 2011 MERCEDES BENZ SLK2 - 2001 MERCEDES BENZ SLK230 - 2004 to 2005 MERCEDES BENZ SLK230 - 2005 to 2009 MERCEDES BENZ SLK280 - 2009 MERCEDES BENZ SLK300 - 2004 MERCEDES BENZ SLK32 - 2001 to 2005 MERCEDES BENZ SLK320 - 2005 to 2009 MERCEDES BENZ SLK350 - 2005 to 2009 MERCEDES BENZ SLK55 - 2015 MERCEDES BENZ redundant S550E - 2002 to 2004 MERCEDES\-BENZ AMG C32 - 2005 to 2006 MERCEDES\-BENZ AMG C55 - 2010 to 2014 MERCEDES\-BENZ AMG C63 - 2003 MERCEDES\-BENZ AMG CLK55 - 2005 MERCEDES\-BENZ AMG CLK55 - 2006 MERCEDES\-BENZ AMG CLS55 - 2007 to 2011 MERCEDES\-BENZ AMG CLS63 - 2017 MERCEDES\-BENZ AMG E43 - 2004 to 2006 MERCEDES\-BENZ AMG E55 - 2007 to 2009 MERCEDES\-BENZ AMG E63 - 2016 to 2019 MERCEDES\-BENZ AMG GLE43 - 2016 to 2019 MERCEDES\-BENZ AMG GLE63 - 2018 MERCEDES\-BENZ AMG GLE63S - 2007 to 2015 MERCEDES\-BENZ AMG ML63 - 2013 MERCEDES\-BENZ AMG S63 - 2017 to 2020 MERCEDES\-BENZ AMG SLC43 - 2013 MERCEDES\-BENZ AMG SLK55 - 2015 MERCEDES\-BENZ AMG SLK55 - 2012 to 2015 MERCEDES\-BENZ C250 - 2010 to 2014 MERCEDES\-BENZ C300 - 2010 to 2015 MERCEDES\-BENZ C350 - 2011 MERCEDES\-BENZ C63 - 2010 to 2014 MERCEDES\-BENZ CL550 - 2010 to 2014 MERCEDES\-BENZ CL600 - 2010 to 2014 MERCEDES\-BENZ CL63 - 2010 to 2014 MERCEDES\-BENZ CL65 - 2012 MERCEDES\-BENZ CLS - 2016 MERCEDES\-BENZ CLS 400 - 2016 MERCEDES\-BENZ CLS 550 - 2016 MERCEDES\-BENZ CLS 63S - 2011 MERCEDES\-BENZ CLS300 - 2015 MERCEDES\-BENZ CLS400 - 2010 to 2015 MERCEDES\-BENZ CLS550 - 2012 to 2015 MERCEDES\-BENZ CLS63 - 2014 to 2015 MERCEDES\-BENZ CLS63S - 2015 to 2016 MERCEDES\-BENZ E250 - 2006 to 2017 MERCEDES\-BENZ E350 - 2015 to 2017 MERCEDES\-BENZ E400 - 2013 to 2015 MERCEDES\-BENZ E400 HYBRID - 2010 to 2017 MERCEDES\-BENZ E550 - 2010 to 2014 MERCEDES\-BENZ E63 - 2016 to 2017 MERCEDES\-BENZ GLE450 - 2016 to 2017 MERCEDES\-BENZ GLE63S - 2015 MERCEDES\-BENZ ML250 - 2010 to 2011 MERCEDES\-BENZ ML320 - 2010 to 2015 MERCEDES\-BENZ ML350 - 2013 to 2015 MERCEDES\-BENZ ML400 - 2010 to 2011 MERCEDES\-BENZ ML450 - 2010 to 2015 MERCEDES\-BENZ ML500 - 2010 to 2015 MERCEDES\-BENZ ML550 - 2010 to 2011 MERCEDES\-BENZ ML63 - 2010 MERCEDES\-BENZ R320 - 2006 to 2012 MERCEDES\-BENZ R350 - 2012 to 2013 MERCEDES\-BENZ S350 - 2010 to 2013 MERCEDES\-BENZ S400 - 2013 MERCEDES\-BENZ S450 - 2010 to 2011 MERCEDES\-BENZ S550 - 2013 MERCEDES\-BENZ S550 - 2010 to 2013 MERCEDES\-BENZ S600 - 2010 to 2012 MERCEDES\-BENZ S63 - 2010 to 2013 MERCEDES\-BENZ S65 - 2018 to 2020 MERCEDES\-BENZ SLC 300 - 2017 MERCEDES\-BENZ SLC 43 AMG - 2016 to 2017 MERCEDES\-BENZ SLC300 - 2017 MERCEDES\-BENZ SLK 350 - 2002 to 2003 MERCEDES\-BENZ SLK230 - 2014 to 2016 MERCEDES\-BENZ SLK250 - 2015 to 2016 MERCEDES\-BENZ SLK300 - 2012 to 2016 MERCEDES\-BENZ SLK350 - 2014 MERCEDES\-BENZ SLK55 - 2016 MERCEDES\-BENZ SLK55 AMG - 2013 MERCEDES\-BENz SLK250 JSON: [/v1/bulletins/11017039](/v1/bulletins/11017039) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20LI83.20-P-051802&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11017039&vehicle=Service%20bulletin%20LI83.20-P-051802)