The front brake pad wear sensor (OEM A2015400317) is a genuine-equivalent Mercedes-Benz component designed to monitor the wear level of your vehicle’s brake pads and notify the driver when replacement is needed. Installed on the front axle, this wear sensor connects to the brake pad and sends a signal to the instrument cluster once the friction material reaches its minimum safe thickness. Replacing worn sensors when fitting new brake pads helps maintain braking performance and ensures early warning for continued safe operation.

OEM Number: A2015400317, 2015400317

Placement on Vehicle : Front Left OR Right

Length : Apprx. 180 mm

Brake Type : Disc Brake

Make	Model	Variant	Type	Engine	Chassis	Year
Mercedes-Benz	124	Diesel Estate	250 TD	2497cc 66KW 90HP OM 602.912	RWD -- S124	1985-1993
Mercedes-Benz	124	Diesel Estate	250 TD	2497cc 69KW 94HP OM 602.912	RWD -- S124	1989-1993
Mercedes-Benz	124	Diesel Estate	250 TD Turbo	2497cc 93KW 126HP OM 602.962	RWD -- S124	1988-1993
Mercedes-Benz	124	Diesel Estate	300 T Turbo-D 4-matic	2996cc 108KW 147HP OM 603.963	AWD -- S124	1989-1993
Mercedes-Benz	124	Diesel Estate	300 TD	2996cc 81KW 110HP OM 603.912	RWD -- S124	1989-1993
Mercedes-Benz	124	Diesel Estate	300 TD	2996cc 83KW 113HP OM 603.912	RWD -- S124	1989-1993
Mercedes-Benz	124	Diesel Estate	300T Turbo D	2996cc 108KW 147HP OM 603.960	RWD -- S124	1989-1993
Mercedes-Benz	124	Diesel Saloon	200 D	1997cc 55KW 75HP OM 601.912	RWD -- W124	1989-1993
Mercedes-Benz	124	Diesel Saloon	250 D	2497cc 66KW 90HP OM 602.912	RWD -- W124	1985-1993
Mercedes-Benz	124	Diesel Saloon	250 D	2497cc 69KW 94HP OM 602.912	RWD -- W124	1989-1993
Mercedes-Benz	124	Diesel Saloon	250 Turbo-D	2497cc 93KW 126HP OM 602.962	RWD -- W124	1988-1993
Mercedes-Benz	124	Diesel Saloon	300 D	2996cc 81KW 110HP OM 603.912	RWD -- W124	1990-1993
Mercedes-Benz	124	Diesel Saloon	300 D	2996cc 83KW 113HP OM 603.912	RWD -- W124	1989-1993
Mercedes-Benz	124	Diesel Saloon	300 D 4-matic	2996cc 80KW 109HP OM 603.913	AWD -- W124	1986-1992
Mercedes-Benz	124	Diesel Saloon	300 D 4-matic	2996cc 83KW 113HP OM 603.913	AWD -- W124	1989-1993
Mercedes-Benz	124	Diesel Saloon	300 Turbo-D	2996cc 108KW 147HP OM 603.960	RWD -- W124	1988-1993
Mercedes-Benz	124	Diesel Saloon	300 Turbo-D 4-matic	2996cc 108KW 147HP OM 603.963	AWD -- W124	1988-1993
Mercedes-Benz	124	Petrol Convertible	300 CE 24V	2960cc 162KW 220HP M 104.980	RWD -- A124	1992-1993
Mercedes-Benz	124	Petrol Coupe	220 CE	2199cc 110KW 150HP M 111.960	RWD -- C124	1992-1993
Mercedes-Benz	124	Petrol Coupe	230 CE	2298cc 100KW 136HP M 102.982	RWD -- C124	1987-1992
Mercedes-Benz	124	Petrol Coupe	230 CE	2298cc 97KW 132HP M 102.982	RWD -- C124	1987-1992
Mercedes-Benz	124	Petrol Coupe	230 CE Cat	2298cc 97KW 132HP M 102.982	RWD -- C124	1989-1992
Mercedes-Benz	124	Petrol Coupe	300 CE	2960cc 132KW 180HP M 103.983	RWD -- C124	1987-1993
Mercedes-Benz	124	Petrol Coupe	300 CE 24V	2960cc 162KW 220HP M 104.980	RWD -- C124	1989-1992
Mercedes-Benz	124	Petrol Coupe	300 CE 24V	2960cc 170KW 231HP M 104.980	RWD -- C124	1989-1992
Mercedes-Benz	124	Petrol Coupe	320 CE	3199cc 162KW 220HP M 104.992	RWD -- C124	1992-1993
Mercedes-Benz	124	Petrol Estate	200 TE	1996cc 87KW 118HP M 102.963	RWD -- S124	1988-1992
Mercedes-Benz	124	Petrol Estate	230 TE Cat	2298cc 97KW 132HP M 102.982	RWD -- S124	1989-1992
Mercedes-Benz	124	Petrol Estate	260 TE FGST	2597cc 118KW 160HP M 103.940	RWD -- S124	1989-1992
Mercedes-Benz	124	Petrol Estate	280 TE	2799cc 145KW 197HP M 104.942	RWD -- S124	1992-1993
Mercedes-Benz	124	Petrol Estate	300 TE 24V	2960cc 170KW 231HP M 104.980	RWD -- S124	1989-1992
Mercedes-Benz	124	Petrol Estate	300 TE 4-matic	2960cc 132KW 180HP M 103.985	AWD -- S124	1986-1993
Mercedes-Benz	124	Petrol Estate	320 TE	3199cc 162KW 220HP M 104.992	RWD -- S124	1992-1993
Mercedes-Benz	124	Petrol Saloon	200 E	1996cc 87KW 118HP M 102.963	RWD -- W124	1988-1993
Mercedes-Benz	124	Petrol Saloon	200 E	1997cc 77KW 105HP M 102.922	RWD -- W124	1992-1993
Mercedes-Benz	124	Petrol Saloon	200 E	1998cc 100KW 136HP M 111.940	RWD -- W124	1992-1993
Mercedes-Benz	124	Petrol Saloon	220 E	2199cc 110KW 150HP M 111.960	RWD -- W124	1992-1993
Mercedes-Benz	124	Petrol Saloon	230 E	2298cc 100KW 136HP M 102.982	RWD -- W124	1985-1993
Mercedes-Benz	124	Petrol Saloon	230 E	2298cc 97KW 132HP M 102.982	RWD -- W124	1984-1992
Mercedes-Benz	124	Petrol Saloon	230 E Cat	2298cc 97KW 132HP M 102.982	RWD -- W124	1989-1993
Mercedes-Benz	124	Petrol Saloon	260 E	2597cc 118KW 160HP M 103.940	RWD -- W124	1985-1992
Mercedes-Benz	124	Petrol Saloon	260 E 4-matic	2597cc 118KW 160HP M 103.943	AWD -- W124	1986-1992
Mercedes-Benz	124	Petrol Saloon	280 E	2799cc 145KW 197HP M 104.942	RWD -- W124	1992-1993
Mercedes-Benz	124	Petrol Saloon	300 E	2960cc 132KW 180HP M 103.983	RWD -- W124	1985-1992
Mercedes-Benz	124	Petrol Saloon	300 E	2960cc 138KW 188HP M 103.983	RWD -- W124	1985-1992
Mercedes-Benz	124	Petrol Saloon	300 E 24V	2960cc 162KW 220HP M 104.980	RWD -- W124	1988-1992
Mercedes-Benz	124	Petrol Saloon	300 E 24V	2960cc 170KW 231HP M 104.980	RWD -- W124	1988-1992
Mercedes-Benz	124	Petrol Saloon	300 E-24 AMG	3428cc 200KW 272HP M 104.980 (AMG 3.4)	RWD -- W124	1991-1993
Mercedes-Benz	124	Petrol Saloon	300e 4-matic	2960cc 132KW 180HP M 103.985	AWD -- W124	1986-1993
Mercedes-Benz	124	Petrol Saloon	300e 4-matic	2960cc 138KW 188HP M 103.983	AWD -- W124	1986-1992
Mercedes-Benz	124	Petrol Saloon	320 E	3199cc 162KW 220HP M 104.992	RWD -- W124	1992-1993
Mercedes-Benz	124	Petrol Saloon	400 E 4.2	4196cc 205KW 279HP M 119.975	RWD -- W124	1992-1993
Mercedes-Benz	124	Petrol Saloon	500 E	4973cc 240KW 326HP M 119.974	RWD -- W124	1991-1993
Mercedes-Benz	190	Diesel Saloon	D 2.0	1997cc 55KW 75HP OM 601.911	RWD -- W201	1989-1993
Mercedes-Benz	190	Diesel Saloon	D 2.5	2497cc 66KW 90HP OM 602.911	RWD -- W201	1985-1993
Mercedes-Benz	190	Diesel Saloon	D 2.5	2497cc 69KW 94HP OM 602.911	RWD -- W201	1989-1993
Mercedes-Benz	190	Diesel Saloon	Turbo-D 2.5	2497cc 90KW 122HP OM 602.961	RWD -- W201	1988-1993
Mercedes-Benz	190	Diesel Saloon	Turbo-D 2.5	2497cc 93KW 126HP OM 602.961	RWD -- W201	1988-1993
Mercedes-Benz	190	Petrol Saloon	2.0	1996cc 75KW 102HP M 102.924	RWD -- W201	1986-1990
Mercedes-Benz	190	Petrol Saloon	2.0	1996cc 77KW 105HP M 102.924	RWD -- W201	1983-1990
Mercedes-Benz	190	Petrol Saloon	E 1.8	1797cc 80KW 109HP M 102.910	RWD -- W201	1990-1993
Mercedes-Benz	190	Petrol Saloon	E 2.0	1996cc 87KW 118HP M 102.962	RWD -- W201	1985-1993
Mercedes-Benz	190	Petrol Saloon	E 2.0	1996cc 90KW 122HP M 102.961;M 102.962	RWD -- W201	1982-1993
Mercedes-Benz	190	Petrol Saloon	E 2.0	1996cc 93KW 126HP M 102.961	RWD -- W201	1982-1993
Mercedes-Benz	190	Petrol Saloon	E 2.3	2298cc 100KW 136HP M 102.985	RWD -- W201	1986-1993
Mercedes-Benz	190	Petrol Saloon	E 2.3	2298cc 97KW 132HP M 102.985	RWD -- W201	1986-1991
Mercedes-Benz	190	Petrol Saloon	E 2.5 16V	2498cc 150KW 204HP M 102.990	RWD -- W201	1988-1993
Mercedes-Benz	190	Petrol Saloon	E 2.5-16 Evolution	2498cc 143KW 194HP M 102.991;M 102.992	RWD -- W201	1989-1993
Mercedes-Benz	190	Petrol Saloon	E 2.5-16 Evolution II	2498cc 173KW 235HP M 102.992	RWD -- W201	1990-1993
Mercedes-Benz	190	Petrol Saloon	E 2.6	2597cc 118KW 160HP M 103.942	RWD -- W201	1986-1993
Mercedes-Benz	E-Class	Diesel Estate	E 250 Turbo D	2497cc 93KW 126HP OM 602.962	RWD -- S124	1993-1996
Mercedes-Benz	E-Class	Diesel Estate	E 300 T Turbo-D	2996cc 108KW 147HP OM 603.960	RWD -- S124	1993-1996
Mercedes-Benz	E-Class	Diesel Estate	E 300 TD	2996cc 100KW 136HP OM 606.910	RWD -- S124	1993-1996
Mercedes-Benz	E-Class	Diesel Saloon	E 250 D	2497cc 83KW 113HP OM 605.911	RWD -- W124	1993-1995
Mercedes-Benz	E-Class	Diesel Saloon	E 250 Turbo-D	2497cc 93KW 126HP OM 602.962	RWD -- W124	1993-1995
Mercedes-Benz	E-Class	Diesel Saloon	E 300 Turbo-D	2996cc 108KW 147HP OM 603.960	RWD -- W124	1993-1995
Mercedes-Benz	E-Class	Diesel Saloon	E300 D	2996cc 100KW 136HP OM 606.910	RWD -- W124	1993-1995
Mercedes-Benz	E-Class	Petrol Estate	E 200 T	1998cc 100KW 136HP M 111.940	RWD -- S124	1993-1996
Mercedes-Benz	E-Class	Petrol Estate	E 220 T	2199cc 110KW 150HP M 111.960	RWD -- S124	1993-1996
Mercedes-Benz	E-Class	Petrol Estate	E 300 T 4-matic	2960cc 132KW 180HP M 103.985	AWD -- S124	1993-1996
Mercedes-Benz	E-Class	Petrol Estate	E 320 T	3199cc 162KW 220HP M 104.992	RWD -- S124	1993-1996
Mercedes-Benz	E-Class	Petrol Saloon	E 200	1998cc 100KW 136HP M 111.940	RWD -- W124	1993-1995
Mercedes-Benz	E-Class	Petrol Saloon	E 220	2199cc 110KW 150HP M 111.960	RWD -- W124	1993-1995
Mercedes-Benz	E-Class	Petrol Saloon	E 300 4-matic	2960cc 132KW 180HP M 103.985	AWD -- W124	1993-1995
Mercedes-Benz	E-Class	Petrol Saloon	E 320	3199cc 162KW 220HP M 104.992	RWD -- W124	1993-1995
Mercedes-Benz	E-Class	Petrol Saloon	E 420	4196cc 205KW 279HP M 119.975	RWD -- W124	1993-1995
Mercedes-Benz	S-Class	Petrol Coupe	420 SEC	4196cc 150KW 204HP M 116.965	RWD -- C126	1985-1991
Mercedes-Benz	S-Class	Petrol Coupe	420 SEC	4196cc 165KW 224HP M 116.965	RWD -- C126	1985-1991
Mercedes-Benz	S-Class	Petrol Coupe	420 SEC	4196cc 170KW 231HP M 116.965	RWD -- C126	1986-1991
Mercedes-Benz	S-Class	Petrol Coupe	500 SEC	4973cc 164KW 223HP M 117.965	RWD -- C126	1985-1991
Mercedes-Benz	S-Class	Petrol Coupe	500 SEC	4973cc 180KW 245HP M 117.965	RWD -- C126	1985-1991
Mercedes-Benz	S-Class	Petrol Coupe	500 SEC	4973cc 185KW 252HP M 117.965	RWD -- C126	1987-1991
Mercedes-Benz	S-Class	Petrol Coupe	500 SEC	4973cc 195KW 265HP M 117.965	RWD -- C126	1985-1991
Mercedes-Benz	S-Class	Petrol Coupe	500 SEC Cat	4973cc 185KW 252HP M 117.965	RWD -- C126	1989-1991
Mercedes-Benz	S-Class	Petrol Coupe	560 SEC	5547cc 178KW 242HP M 117.968	RWD -- C126	1985-1991
Mercedes-Benz	S-Class	Petrol Coupe	560 SEC	5547cc 205KW 279HP M 117.968	RWD -- C126	1985-1991
Mercedes-Benz	S-Class	Petrol Coupe	560 SEC	5547cc 220KW 300HP M 117.968	RWD -- C126	1985-1989
Mercedes-Benz	Saloon	Diesel Saloon	300 TD SD	3449cc 110KW 150HP OM 603.971	RWD -- W124	1991-1993
Make	Model	Variant	Type	Engine	Chassis	Year

Our SKU: TM2015400317_313

All our Front Left Or Right Brake Pad Wear Sensor Fits Mercedes E, S Class A2015400317 are OEM quality and reliable after market car parts. This Front Left Or Right Brake Pad Wear Sensor Fits Mercedes E, S Class A2015400317 is specifically compatible with Mercedes-Benz: 124, 190, E-Class, S-Class, Saloon, .

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 Wear Monitoring
This sensor reliably detects brake pad wear on the front axle and sends a visual warning to your dashboard, helping you service braking components before they compromise performance.

Direct OEM-Match Fitment (A2015400317)
Designed as a direct replacement for Mercedes-Benz part number A2015400317, it fits exactly where the original sensor sits without need for modification.

Improves Brake Safety
Brake pad wear sensors play a critical role in safety by alerting you to worn pads early, which can prevent reduced stopping power and uneven braking. 

Ideal with Brake Pad Replacement
When brakes are serviced, the original sensor is often damaged or worn — replacing it at the same time ensures continuous monitoring. 

Front Left & Right Compatibility
This wear sensor can be installed on either the left or right front brake pad, making it a versatile choice for brake servicing.

Frequently Asked Questions (FAQs)

Q: What does a brake pad wear sensor do?
A: It detects the thickness of brake pads and triggers a dashboard warning when the pad material has worn down to a level requiring replacement.

Q: Why is it important to replace the sensor when changing brake pads?
A: Wear sensors often break or wear out as pads wear; replacing them with new pads ensures proper system warnings for future maintenance cycles.

Q: Is this sensor a direct fit for my car?
A: Yes — when your vehicle uses the A2015400317 reference, this sensor is a direct OEM-equivalent replacement and installs in place of the factory unit.

Q: Which vehicles typically use this part?
A: This part number is used across many Mercedes-Benz E-Class and S-Class models, often on classic platforms such as W124, W126, S124, and related diesel & petrol variants. Always check fitment by VIN or existing part reference.

Q: Can the wear sensor be fitted myself?
A: Many DIYers can replace brake wear sensors during a brake pad change, but professional installation ensures the sensor and connector are correctly routed and secured.