The glow plug control relay (OEM A6429001402) is a critical engine electrical component designed to manage the activation of glow plugs in diesel engines, particularly in Mercedes-Benz applications. This relay regulates the electric current supplied to the glow plugs during engine start-up, ensuring proper pre-heating of each cylinder for efficient cold starts and reduced emissions. When this control relay fails, it can lead to hard starting, extended crank times, and increased white smoke during start-up. This replacement part is designed to match the original specification for reliable performance and direct fitment.

OEM Number: K68013182AD, K68013182AC, K68013182AB, K68013182AA, A6421532079, A6421530379, A6421531979, 6429001402

GLOW PLUG CONTROL UNIT RELAY
EASY INSTALL - DIRECT REPLACEMENT 
2 PLUGS - 1 AND 12 PINS

Voltage: 12V 

Quantity : 1

Make	Model	Variant	Type	Engine	Chassis	Year
Chrysler	300C	Diesel Estate	3.0 CRD	2987cc 160KW 218HP EXL	RWD -- LX,LE	2005-2010
Chrysler	300C	Diesel Saloon	3.0 CRD	2987cc 160KW 218HP EXL	RWD -- LX,LE	2005-2012
Chrysler	300C	Diesel Saloon	3.0 V6 CRD	2987cc 155KW 211HP EXL	RWD -- LX,LE	2010-2012
Jeep	Grand Cherokee	Diesel Off-Road Vehicle	3.0 CRD	2987cc 160KW 218HP EXL	RWD III WH,WK	2005-2010
Jeep	Grand Cherokee	Diesel Off-Road Vehicle	3.0 CRD 4x4	2987cc 155KW 211HP EXL	AWD III WH,WK	2006-2010
Jeep	Grand Cherokee	Diesel Off-Road Vehicle	3.0 CRD 4x4	2987cc 160KW 218HP EXL	AWD III WH,WK	2005-2010
Mercedes-Benz	C-Class	Diesel Estate	C 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- S203	2005-2007
Mercedes-Benz	C-Class	Diesel Estate	C 320 CDI	2987cc 165KW 224HP OM 642.960	RWD -- S204	2007-2014
Mercedes-Benz	C-Class	Diesel Estate	C 320 CDI 4-matic	2987cc 165KW 224HP OM 642.961	AWD -- S204	2007-2011
Mercedes-Benz	C-Class	Diesel Saloon	C 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- W203	2005-2007
Mercedes-Benz	C-Class	Diesel Saloon	C 320 CDI	2987cc 165KW 224HP OM 642.960	RWD -- W204	2007-2014
Mercedes-Benz	C-Class	Diesel Saloon	C 320 CDI 4-matic	2987cc 165KW 224HP OM 642.961	AWD -- W204	2007-2014
Mercedes-Benz	C-Class	Diesel Saloon	C 350 CDI	2987cc 165KW 224HP OM 642.960	RWD -- W204	2009-2014
Mercedes-Benz	C-Class	Diesel Saloon	C 350 CDI 4-matic	2987cc 165KW 224HP OM 642.961	AWD -- W204	2009-2014
Mercedes-Benz	CLK	Diesel Convertible	CLK 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- A209	2005-2010
Mercedes-Benz	CLK	Diesel Coupe	CLK 320 CDI	2987cc 165KW 224HP OM 642.910	RWD -- C209	2005-2009
Mercedes-Benz	CLS	Diesel Coupe	CLS 320 CDI	2987cc 165KW 224HP OM 642.920	RWD -- C219	2005-2010
Mercedes-Benz	CLS	Diesel Coupe	CLS 350 CDI	2987cc 165KW 224HP OM 642.920	RWD -- C219	2009-2010
Mercedes-Benz	E-Class	Diesel Chassis Cab	E 280 CDI	2987cc 140KW 190HP OM 642.920	RWD -- VF211	2005-2009
Mercedes-Benz	E-Class	Diesel Estate	E 280 T CDI	2987cc 140KW 190HP OM 642.920	RWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Estate	E 280 T CDI 4-matic	2987cc 140KW 190HP OM 642.921	AWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Estate	E 320 T CDI	2987cc 155KW 211HP OM 642.920	RWD -- S211	2007-2009
Mercedes-Benz	E-Class	Diesel Estate	E 320 T CDI	2987cc 165KW 224HP OM 642.920	RWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Estate	E 320 T CDI 4-matic	2987cc 165KW 224HP OM 642.921	AWD -- S211	2005-2009
Mercedes-Benz	E-Class	Diesel Saloon	E 280 CDI	2987cc 140KW 190HP OM 642.920	RWD -- W211	2005-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 280 CDI 4-matic	2987cc 140KW 190HP OM 642.921	AWD -- W211	2005-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 300 BlueTEC	2987cc 155KW 211HP OM 642.920	RWD -- W211	2007-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 320 CDI	2987cc 165KW 224HP OM 642.920	RWD -- W211	2005-2008
Mercedes-Benz	E-Class	Diesel Saloon	E 320 CDI 4-matic	2987cc 165KW 224HP OM 642.910;OM 642.921	AWD -- W211	2005-2008
Mercedes-Benz	G-Class	Diesel Off-Road Vehicle	G 280 CDI	2987cc 135KW 184HP OM 642.884;OM 642.975	AWD -- W461	2009-2024
Mercedes-Benz	G-Class	Diesel Off-Road Vehicle	G 300 CDI	2987cc 135KW 184HP OM 642.884	AWD -- W461	2010-2023
Mercedes-Benz	GL-Class	Diesel SUV	GL 320 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- X164	2006-2009
Mercedes-Benz	GL-Class	Diesel SUV	GL 350 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- X164	2009-2012
Mercedes-Benz	GLK-Class	Diesel SUV	320 CDI 4-matic	2987cc 165KW 224HP OM 642.961	AWD -- X204	2008-2015
Mercedes-Benz	M-Class	Diesel SUV	ML 280 CDI 4-matic	2987cc 140KW 190HP OM 642.940	AWD -- W164	2005-2009
Mercedes-Benz	M-Class	Diesel SUV	ML 300 CDI 4-matic	2987cc 140KW 190HP OM 642.940	AWD -- W164	2009-2011
Mercedes-Benz	M-Class	Diesel SUV	ML 320 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- W164	2005-2009
Mercedes-Benz	M-Class	Diesel SUV	ML 350 CDI 4-matic	2987cc 165KW 224HP OM 642.940	AWD -- W164	2009-2011
Mercedes-Benz	R-Class	Diesel MPV	R 280 CDI	2987cc 140KW 190HP OM 642.870;OM 642.872;OM 642.950	RWD -- W251,V251	2006-2012
Mercedes-Benz	R-Class	Diesel MPV	R 280 CDI 4-matic	2987cc 140KW 190HP OM 642.950	AWD -- W251,V251	2006-2012
Mercedes-Benz	R-Class	Diesel MPV	R 300 CDI	2987cc 140KW 190HP OM 642.870;OM 642.872;OM 642.950	RWD -- W251,V251	2009-2012
Mercedes-Benz	R-Class	Diesel MPV	R 300 CDI 4-matic	2987cc 140KW 190HP OM 642.950	AWD -- W251,V251	2009-2012
Mercedes-Benz	R-Class	Diesel MPV	R 320 CDI 4-matic	2987cc 165KW 224HP OM 642.950	AWD -- W251,V251	2006-2010
Mercedes-Benz	R-Class	Diesel MPV	R 350 CDI 4-matic	2987cc 165KW 224HP OM 642.950	AWD -- W251,V251	2009-2012
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI	2987cc 155KW 211HP OM 642.930	RWD -- W221	2005-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI	2987cc 173KW 235HP OM 642.930	RWD -- W221	2005-2009
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI 4-matic	2987cc 155KW 211HP OM 642.932	AWD -- W221	2005-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 320 CDI 4-matic	2987cc 173KW 235HP OM 642.932	AWD -- W221	2006-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 350 CDI	2987cc 155KW 211HP OM 642.930	RWD -- W221	2009-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 350 CDI	2987cc 173KW 235HP OM 642.930	RWD -- W221	2009-2013
Mercedes-Benz	S-Class	Diesel Saloon	S 350 CDI 4-matic	2987cc 155KW 211HP OM 642.932	AWD -- W221	2009-2010
Mercedes-Benz	Sprinter 3-T	Diesel Chassis Cab	218 CDI	2987cc 135KW 184HP OM 642.896;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3-T	Diesel Chassis Cab	219 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3-T	Diesel Van	218 CDI	2987cc 135KW 184HP OM 642.896;OM 642.992	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3-T	Diesel Van	219 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Bus	318 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2008-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Bus	318 CDI 4x4	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	AWD -- B906	2008-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Bus	319 CDI	2987cc 140KW 190HP OM 642.899	RWD -- B907	2018-2024
Mercedes-Benz	Sprinter 3.5-T	Diesel Bus	319 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Bus	319 CDI / BlueTEC 4x4	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	AWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Bus	319 CDI All-wheel Drive	2987cc 140KW 190HP OM 642.899	AWD -- B907	2019-2024
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	318 CDI (906.131, 906.133, 906.135, 906.231, 906.233,...	2987cc 135KW 184HP OM 642.896;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	318 CDI 4x4 (906.131, 906.133, 906.135, 906.231, 906.233...	2987cc 135KW 184HP OM 642.896;OM 642.992;OM 642.993	AWD -- B906	2008-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	319 CDI / BlueTEC (906.131, 906.133, 906.135, 906.231,...	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	319 CDI / BlueTEC 4x4 (906.131, 906.133, 906.135,...	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.992	AWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	319 CDI All-wheel Drive	2987cc 140KW 190HP OM 642.899	AWD -- B907,B910	2019-2024
Mercedes-Benz	Sprinter 3.5-T	Diesel Chassis Cab	319 CDI RWD	2987cc 140KW 190HP OM 642.899	RWD -- B907,B910	2018-2024
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	318 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	318 CDI 4x4	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	AWD -- B906	2008-2009
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	319 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	319 CDI / BlueTEC 4x4 (906.631, 906.633, 906.635,...	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	AWD -- B906	2009-2018
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	319 CDI All-wheel Drive	2987cc 140KW 190HP OM 642.899	AWD -- B907,B910	2019-2024
Mercedes-Benz	Sprinter 3.5-T	Diesel Van	319 CDI RWD	2987cc 140KW 190HP OM 642.899	RWD -- B907,B910	2018-2024
Mercedes-Benz	Sprinter 4-T	Diesel Bus	419 CDI	2987cc 140KW 190HP OM 642.899	RWD -- B907	2018-2024
Mercedes-Benz	Sprinter 4-T	Diesel Chassis Cab	419 CDI All-wheel Drive (907.143, 907.145, 907.243,...	2987cc 140KW 190HP OM 642.899	AWD -- B907,B910	2019-2024
Mercedes-Benz	Sprinter 4-T	Diesel Chassis Cab	419 CDI RWD	2987cc 140KW 190HP OM 642.899	RWD -- B907,B910	2018-2024
Mercedes-Benz	Sprinter 4-T	Diesel Van	419 CDI All-wheel Drive	2987cc 140KW 190HP OM 642.899	AWD -- B907,B910	2019-2024
Mercedes-Benz	Sprinter 4-T	Diesel Van	419 CDI RWD	2987cc 140KW 190HP OM 642.899	RWD -- B907,B910	2018-2024
Mercedes-Benz	Sprinter 4.6-T	Diesel Chassis Cab	418 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 4.6-T	Diesel Chassis Cab	419 CDI	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 4.6-T	Diesel Van	418 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992	RWD -- B906	2009-2016
Mercedes-Benz	Sprinter 4.6-T	Diesel Van	419 CDI	2987cc 140KW 190HP OM 642.896;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 5-T	Diesel Bus	513 CDI	2143cc 95KW 129HP OM 651.955	RWD -- B906	2009-2016
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	518 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	518 CDI 4x4	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	AWD -- B906	2006-2009
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	519 CDI	2987cc 140KW 190HP OM 642.899	RWD -- B907	2018-2024
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	519 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	519 CDI / BlueTEC 4x4 (906.153, 906.155, 906.253,...	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	AWD -- B906	2009-2018
Mercedes-Benz	Sprinter 5-T	Diesel Chassis Cab	519 CDI All-wheel Drive (907.153, 907.155, 907.253,...	2987cc 140KW 190HP OM 642.899	AWD -- B907	2019-2024
Mercedes-Benz	Sprinter 5-T	Diesel Van	518 CDI	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	RWD -- B906	2006-2009
Mercedes-Benz	Sprinter 5-T	Diesel Van	518 CDI 4x4	2987cc 135KW 184HP OM 642.896;OM 642.986;OM 642.992;OM 642.993	AWD -- B906	2006-2016
Mercedes-Benz	Sprinter 5-T	Diesel Van	519 CDI	2987cc 140KW 190HP OM 642.899	RWD -- B907	2018-2024
Mercedes-Benz	Sprinter 5-T	Diesel Van	519 CDI / BlueTEC	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	RWD -- B906	2009-2018
Mercedes-Benz	Sprinter 5-T	Diesel Van	519 CDI / BlueTEC 4x4	2987cc 140KW 190HP OM 642.896;OM 642.898;OM 642.986;OM 642.992	AWD -- B906	2009-2018
Mercedes-Benz	Sprinter 5-T	Diesel Van	519 CDI All-wheel Drive	2987cc 140KW 190HP OM 642.899	AWD -- B907	2019-2024
Mercedes-Benz	Viano	Diesel Bus	CDI 3.0	2987cc 150KW 204HP OM 642.990	RWD -- W639	2006-2024
Mercedes-Benz	Viano	Diesel Bus	CDI 3.0	2987cc 165KW 224HP OM 642.890	RWD -- W639	2010-2024
Mercedes-Benz	Vito	Diesel Bus	120 CDI	2987cc 150KW 204HP OM 642.990	RWD -- W639	2006-2024
Mercedes-Benz	Vito / Mixto	Diesel Van	120 CDI	2987cc 150KW 204HP OM 642.990	RWD -- W639	2006-2024
Make	Model	Variant	Type	Engine	Chassis	Year

Our SKU: TMA6429002800_94

All our Glow Plug Control Relay A6429001402 are OEM quality and reliable after market car parts. This Glow Plug Control Relay A6429001402 is specifically compatible with Chrysler: 300C, Jeep: Grand Cherokee, Mercedes-Benz: C-Class, CLK, CLS, E-Class, G-Class, GL-Class, GLK-Class, M-Class, R-Class, S-Class, Sprinter 3-T, Sprinter 3.5-T, Sprinter 4-T, Sprinter 4.6-T, Sprinter 5-T, Viano, Vito, Vito / Mixto, .

Please use our make-model-year tool to check this part's compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.

If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

Key Benefits

Accurate Glow Plug Current Control
The control relay regulates electrical current to the glow plugs based on signals from the engine control unit, ensuring each glow plug receives the correct power for efficient heating and reliable cold-start performance. 

Direct Replacement for A6429001402
Designed to match original equipment part number A6429001402, this relay installs in place of the factory part without modification, helping maintain proper engine start performance.

Improves Cold Start Performance
A functioning glow plug control relay helps ensure quicker, smoother engine starts in diesel vehicles, particularly in cold weather conditions where pre-heating is essential.

Supports Emissions Control
By properly managing glow plug activation timing, the relay contributes to more complete combustion at start-up, which can help reduce unburned fuel emissions and white exhaust smoke.

Enhances Reliability and Engine Health
Replacing a worn or faulty relay can prevent starter strain and reduce the risk of glow plug damage due to improper current regulation, helping maintain long-term engine reliability.

Frequently Asked Questions (FAQs)

Q: What does a glow plug control relay do?
A: The glow plug control relay regulates the electric current supplied to the glow plugs, based on data from the engine control module (ECU), to ensure proper pre-heating of the combustion chamber before engine start-up. This controlled activation improves cold starting and reduces emissions.

Q: What are symptoms of a failing glow plug control relay?
A: Common symptoms include difficulty starting the engine in cold conditions, extended cranking time, persistent glow plug warning lights, and white smoke during start-up.

Q: Can this relay be fitted to my vehicle easily?
A: Yes, this glow plug control relay is designed to be a direct replacement for the original OEM unit with reference A6429001402 and installs without modification when matched to the correct vehicle application.

Q: Which Mercedes engines commonly use this relay?
A: This relay is commonly used with diesel engines such as the Mercedes OM642 V6 and other compatible CDI diesel models where part number A6429001402 is specified. Always confirm part compatibility with your VIN or existing part number before ordering.

Q: Will replacing the relay fix starting problems?
A: If the cause of hard starts or glow plug faults is traced to a faulty control relay, replacing it typically resolves those issues. However, diagnostic testing is recommended to rule out other potential causes such as faulty glow plugs or wiring.