Mercedes-Benz Anti-Theft Alarm Horn / Siren 1645420120

OEM Part #: 164-542-01-20 (1645420120)

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The OEM Anti-Theft Alarm Horn / Siren (Part Number 1645420120) is a vital component designed to safeguard your vehicle against unauthorized access. This factory-original part is located in the engine compartment, specifically mounted on the left side, emitting a distinct 335 Hz sound that alerts of potential theft attempts. Compatible with numerous Mercedes-Benz models, including GL350 (2010-2012), GL450 (2007-2012), ML350 (2003-2011), and R350 (2006-2012), this horn addresses common issues such as malfunctioning or damaged alarms, ensuring proper security functionality. With interchangeable part numbers like 1635420120 and 1635420220, it maintains seamless integration into your vehicle's alarm system, providing reliable protection and peace of mind.

Specifications

Specifications for Anti-Theft Alarm Horn / Siren 1645420120
Fits Vehicle ModelGL320, GL350, GL450, GL550, ML320, ML350, ML430, ML450, ML500, ML550, ML63 AMG, R320, R350, R500, R63 AMG
Fits Vehicle MakeMercedes-Benz
OEM Part No164-542-01-20 (1645420120)
Compatible OEM Part No 163-542-01-20, 163542012064, 163-542-02-20, 163542022064
CategorySiren / Horn

Compatible Vehicles

Fits 73 vehicle configurations across 1 make, 1998-2012.

Check your specific vehicle before ordering. This list shows year, make, and model. Some years have multiple trims or engines that use different parts, and individual listings may have additional fitment notes (e.g. “with sunroof only”). Review the full variant list below, or message us with your VIN and we’ll confirm the match.

Mercedes-Benz

  • GL320 2007-2009 · 3 variants 3 with notes
  • GL350 2010-2012 · 3 variants 3 with notes
  • GL450 2007-2012 · 6 variants 6 with notes
  • GL550 2008-2012 · 5 variants 5 with notes
  • ML320 1998-2009 · 9 variants 6 with notes
  • ML350 2003-2011 · 11 variants 3 with notes
  • ML430 1999-2001 · 3 variants 3 with notes
  • ML450 2010-2011 · 2 variants
  • ML500 2002-2007 · 6 variants 4 with notes
  • ML550 2008-2011 · 4 variants
  • ML63 AMG 2007-2011 · 5 variants
  • R320 2007-2009 · 3 variants
  • R350 2006-2012 · 10 variants
  • R500 2006-2007 · 2 variants
  • R63 AMG 2007
View all 73 vehicle configurations — 33 with fitment notes
Full vehicle fitment list for Anti-Theft Alarm Horn / Siren 1645420120
Year Make Model Trim Engine Note
1998 Mercedes-Benz ML320 SUV 3.2L V6 high note w/o ML55
1999 Mercedes-Benz ML320 SUV 3.2L V6 high note w/o ML55
1999 Mercedes-Benz ML430 SUV 4.3L V8 high note w/o ML55
2000 Mercedes-Benz ML320 SUV 3.2L V6 high note w/o ML55
2000 Mercedes-Benz ML430 SUV 4.3L V8 high note w/o ML55
2001 Mercedes-Benz ML320 SUV 3.2L V6 high note w/o ML55
2001 Mercedes-Benz ML430 SUV 4.3L V8 high note w/o ML55
2002 Mercedes-Benz ML320 SUV 3.2L V6 high note w/o ML55
2002 Mercedes-Benz ML500 SUV 5.0L V8 high note w/o ML55
2003 Mercedes-Benz ML320 SUV 3.2L V6 high note w/o ML55
2003 Mercedes-Benz ML350 SUV 3.7L V6 high note w/o ML55
2003 Mercedes-Benz ML500 SUV 5.0L V8 high note w/o ML55
2004 Mercedes-Benz ML350 SUV 3.7L V6 high note w/o ML55
2004 Mercedes-Benz ML500 SUV 5.0L V8 high note w/o ML55
2005 Mercedes-Benz ML350 SUV 3.7L V6 high note w/o ML55
2005 Mercedes-Benz ML500 SUV 5.0L V8 high note w/o ML55
2006 Mercedes-Benz ML350 SUV 3.5L V6
2006 Mercedes-Benz ML500 SUV 5.0L V8
2006 Mercedes-Benz R350 Wagon 3.5L V6
2006 Mercedes-Benz R500 Wagon 5.0L V8
2007 Mercedes-Benz GL320 SUV 3.0L V6 Diesel Turbo Alarm horn
2007 Mercedes-Benz GL450 SUV 4.7L V8 Alarm horn
2007 Mercedes-Benz ML320 SUV 3.0L V6 Diesel Turbo
2007 Mercedes-Benz ML350 SUV 3.5L V6
2007 Mercedes-Benz ML500 SUV 5.0L V8
2007 Mercedes-Benz ML63 AMG SUV 6.3L V8
2007 Mercedes-Benz R320 Wagon 3.0L V6 Diesel Turbo
2007 Mercedes-Benz R350 Wagon 3.5L V6
2007 Mercedes-Benz R500 Wagon 5.0L V8
2007 Mercedes-Benz R63 AMG Wagon 6.3L V8
2008 Mercedes-Benz GL320 SUV 3.0L V6 Diesel Turbo Alarm horn
2008 Mercedes-Benz GL450 SUV 4.7L V8 Alarm horn
2008 Mercedes-Benz GL550 SUV 5.5L V8 Alarm horn
2008 Mercedes-Benz ML320 SUV 3.0L V6 Diesel Turbo
2008 Mercedes-Benz ML350 SUV 3.5L V6
2008 Mercedes-Benz ML550 SUV 5.5L V8
2008 Mercedes-Benz ML63 AMG SUV 6.3L V8
2008 Mercedes-Benz R320 Wagon 3.0L V6 Diesel Turbo
2008 Mercedes-Benz R350 Wagon 3.5L V6
2009 Mercedes-Benz GL320 SUV 3.0L V6 Diesel Turbo Alarm horn
2009 Mercedes-Benz GL450 SUV 4.7L V8 Alarm horn
2009 Mercedes-Benz GL550 SUV 5.5L V8 Alarm horn
2009 Mercedes-Benz ML320 SUV 3.0L V6 Diesel Turbo
2009 Mercedes-Benz ML350 SUV 3.5L V6
2009 Mercedes-Benz ML550 SUV 5.5L V8
2009 Mercedes-Benz ML63 AMG SUV 6.3L V8
2009 Mercedes-Benz R320 Wagon 3.0L V6 Diesel Turbo
2009 Mercedes-Benz R350 Wagon 3.5L V6
2010 Mercedes-Benz GL350 SUV 3.0L V6 Diesel Turbo Alarm horn
2010 Mercedes-Benz GL450 SUV 4.7L V8 Alarm horn
2010 Mercedes-Benz GL550 SUV 5.5L V8 Alarm horn
2010 Mercedes-Benz ML350 SUV 3.5L V6
2010 Mercedes-Benz ML350 SUV 3.0L V6 Diesel Turbo
2010 Mercedes-Benz ML550 SUV 5.5L V8
2010 Mercedes-Benz ML63 AMG SUV 6.3L V8
2010 Mercedes-Benz R350 Wagon 3.5L V6
2010 Mercedes-Benz R350 Wagon 3.0L V6 Diesel Turbo
2011 Mercedes-Benz GL350 SUV 3.0L V6 Diesel Turbo Alarm horn
2011 Mercedes-Benz GL450 SUV 4.7L V8 Alarm horn
2011 Mercedes-Benz GL550 SUV 5.5L V8 Alarm horn
2011 Mercedes-Benz ML350 SUV 3.5L V6
2011 Mercedes-Benz ML350 SUV 3.0L V6 Diesel Turbo
2011 Mercedes-Benz ML550 SUV 5.5L V8
2011 Mercedes-Benz ML63 AMG SUV 6.3L V8
2011 Mercedes-Benz R350 Wagon 3.5L V6
2011 Mercedes-Benz R350 Wagon 3.0L V6 Diesel Turbo
2012 Mercedes-Benz GL350 SUV 3.0L V6 Diesel Turbo Alarm horn
2012 Mercedes-Benz GL450 SUV 4.7L V8 Alarm horn
2012 Mercedes-Benz GL550 SUV 5.5L V8 Alarm horn
2012 Mercedes-Benz R350 Wagon 3.5L V6
2012 Mercedes-Benz R350 Wagon 3.0L V6 Diesel Turbo
2010 Mercedes-Benz ML450 SUV 3.5L V6
2011 Mercedes-Benz ML450 SUV 3.5L V6

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