W220 S-Class Encyclopedia - Recent changes [en]

ACC and HVAC

Pokseva — Thu, 29 Oct 2026 17:08:11 GMT

Refrigerant pressure sensor (B12): added images

← Older revision		Revision as of 17:08, 29 October 2026
Line 375:		Line 375:
	\|}		\|}

	=~~R134A~~ Refrigerant Temperature Sensor (B12/1)=		= Refrigerant Temperature Sensor (B12/1)=

	==Testing ~~- R134A Refrigerant Temperature Sensor (B12/1)~~==		Part number:
			* OE: A2108300072


			==Testing ==

	Monitor Diagnostic Parameter NR.08: and apply direct heat using an hair drier to the R134A Refrigerant Temperature Sensor B12/1 (located on top of the air conditioner receiver drier at the front left corner of the engine compartment).		Monitor Diagnostic Parameter NR.08: and apply direct heat using an hair drier to the R134A Refrigerant Temperature Sensor B12/1 (located on top of the air conditioner receiver drier at the front left corner of the engine compartment).
Line 390:		Line 394:

	Sensitivity of sensor seems OK.		Sensitivity of sensor seems OK.

			= Refrigerant pressure sensor (B12) =

			Part number:
			* OE: A1408300072
			* THERMOTEC KTT130013 (20 EUR)

			To replace the refrigerant pressure sensor, the refrigerant must be removed from the system. It may be necessary to remove the refrigerant temperature sensor first to access and unscrew the pressure sensor.

			{\|
			\|[[File:W220_refrigerante_temperature_A2108300072_and_pressure_sensors_A1408300072_installed.jpg\|thumb\|none\|Refrigerant temperature and pressure sensors installed]]
			\|[[File:W220_refrigerante_temperature_A2108300072_and_pressure_sensors_A1408300072.jpg\|thumb\|none\|Temperature sensor and pressure sensors (new and old)]]
			\|}

	=Resistance Specification - In Cabin Air Temperature Sensor (N22/b1)=		=Resistance Specification - In Cabin Air Temperature Sensor (N22/b1)=
	The resistance specification for the In Cabin Air Temperature Sensor (N22/b1) is presumed to be the same as [[In Cabin Air Temperature Sensor (N70/b1) and Aspirator in Overhead Control Panel (OCP) (N70)]].		The resistance specification for the In Cabin Air Temperature Sensor (N22/b1) is presumed to be the same as [[In Cabin Air Temperature Sensor (N70/b1) and Aspirator in Overhead Control Panel (OCP) (N70)]].

File:W220 refrigerante temperature A2108300072 and pressure sensors A1408300072 installed.jpg

Pokseva — Thu, 29 Oct 2026 17:05:58 GMT

Pokseva uploaded File:W220 refrigerante temperature A2108300072 and pressure sensors A1408300072 installed.jpg

New page

File:W220 refrigerante temperature A2108300072 and pressure sensors A1408300072.jpg

Pokseva — Thu, 29 Oct 2026 17:05:45 GMT

Pokseva uploaded File:W220 refrigerante temperature A2108300072 and pressure sensors A1408300072.jpg

New page

Fuel pump filter

Pokseva — Sat, 24 Oct 2026 16:38:05 GMT

Parts: Note about humming noise from fuel filter after replacement

← Older revision		Revision as of 16:38, 24 October 2026
(One intermediate revision by the same user not shown)
Line 77:		Line 77:
	====From date: 30/06/2001 (with pluggable connections):====		====From date: 30/06/2001 (with pluggable connections):====
	* OE - A0014701294 (EUR 370)		* OE - A0014701294 (EUR 370)
	* OEM - ~~PIEBURG~~ 7.28126.51.0 (EUR 155)		* OEM - PIERBURG 7.28126.51.0 (EUR 155)
	* BOSCH 0986580354 (EUR 173)		* BOSCH 0986580354 (EUR 173)
	* TOPRAN 401632 (EUR 95)		* TOPRAN 401632 (EUR 95)
Line 84:		Line 84:
	[[File:W220_fuel_pump_A0014701294.jpg\|thumb\|none\|Fuel pump A0014701294]]		[[File:W220_fuel_pump_A0014701294.jpg\|thumb\|none\|Fuel pump A0014701294]]

	The manufacturer of the original fuel pump is ~~PIEBURG~~. Special workshops are able to open them and replace any faulty parts. The inner design of cheaper pumps is different, which leads to lower quality and noisy operation, therefore, in case of fuel pump failure, if possible, the original ~~PIEBURG~~ pump should be repaired.		The manufacturer of the original fuel pump is PIERBURG. Special workshops are able to open them and replace any faulty parts. The inner design of cheaper pumps is different, which leads to lower quality and noisy operation, therefore, in case of fuel pump failure, if possible, the original PIERBURG pump should be repaired.

	The part number for pluggable electrical connector on the vehicle side - A1685452728.		The part number for pluggable electrical connector on the vehicle side - A1685452728.
Line 159:		Line 159:

	* OE A0024773001 OE (EUR 100)		* OE A0024773001 OE (EUR 100)
			* MANN-FILTER WK 720 (EUR 45)
			* OEM BOSCH 0450915003 (EUR 40)
	* OEM Knecht KL82 (EUR 38)		* OEM Knecht KL82 (EUR 38)
	* OEM BOSCH 0450915003 (EUR 40)
	* MANN-FILTER WK 720 (EUR 45)

	{\|		{\|
Line 167:		Line 167:
	\|[[File:W220_fuel_filter_MANN-FILTER_WK_720.jpg\|thumb\|none\|MANN-FILTER WK 720]]		\|[[File:W220_fuel_filter_MANN-FILTER_WK_720.jpg\|thumb\|none\|MANN-FILTER WK 720]]
	\|}		\|}

			MANN in the [https://www.mann-hummel.com/content/dam/mann-filter/pim-assets/technical-information/MFPI112_en_WK_720_Installation.pdf\| official MANN WK 720 technical bulletin] confirms that the WK 720 can develop humming after replacement, often because air entered the fuel system.

	== Fuel pump package ==		== Fuel pump package ==

Engine belt

Pokseva — Fri, 23 Oct 2026 16:30:45 GMT

Tensioner pulley: added torque spec

← Older revision		Revision as of 16:30, 23 October 2026
Line 103:		Line 103:
	\|}		\|}

	To remove pulley, unscrew bolt using Security Torx T50 bit.		To remove pulley, unscrew center bolt using Security Torx T50 bit.

	To remove tensioner assembly, unscrew two Torx E12 bolts. The tensioner has to be fixed in tensioned position to get access to the second bolt.		To remove tensioner assembly, unscrew two Torx E12 bolts (torque spec: 25Nm). The tensioner has to be fixed in tensioned position to get access to the second bolt.

	{\|		{\|
	\|{{#ev:youtube\|https://youtube.com/watch?v=ltmyMS7IRQE\|320\|center\|W220 Tensioner Pulley DIY (By Masood)\|frame}}		\|{{#ev:youtube\|https://youtube.com/watch?v=ltmyMS7IRQE\|320\|center\|W220 Tensioner Pulley DIY (By Masood)\|frame}}
	\|{{#ev:youtube\|https://youtube.com/watch?v=kWbvzzSLyo0\|320\|center\|~~W220~~ Tensioner ~~Pulley DIY (By Masood)~~\|frame}}		\|{{#ev:youtube\|https://youtube.com/watch?v=kWbvzzSLyo0\|320\|center\|M112 Serpentine Belt and Tensioner replacement\|frame}}
	\|}		\|}