Mercedes Benz diagnostics obd

Introduction

XTOOLS D5S

• https://www.youtube.com/watch?v=gDwrVYJ0tow

Samsara and Verizon

OBD2, OBD2 (MB W211, 2003-). OBD2 from 1996. Connectors: Type A or Type B.

• https://obdplanet.com/obd2-protocol/
• https://en.wikipedia.org/wiki/ELM327 https://www.elmelectronics.com/wp-content/uploads/2016/07/ELM327DS.pdf
• https://en.wikipedia.org/wiki/OBD-II_PIDs
• OBDLink and VGate makes good adapters
• (https://github.com/zanac/pyHPSU contains a clean implementation of KWP2000 that many hobbyists have studied and adapted)
• freediag

(Mercedes) ECU reverse engineering

Generic OBD-II readers only access the engine (ECU) and emissions-related systems. Airmatic, SBC brakes, SAM modules, instrument cluster, seat modules, climate, etc. all use Mercedes-specific diagnostics (K-Line and CAN, depending on module). A generic ELM327-based tool cannot properly diagnose these systems. MB alternatives

• OpenVehicleDiag (OVD). Supports: ISO-TP, KWP2000, UDS, J2534, SocketCAN. Need to know Mercedes diagnostic identifiers.
• openStar. Small and incomplete.
• Tactrix OpenPort 2.0 Supports K-Line, CAN, J2534 PassThru. Owners using Tactrix OpenPort + Xentry Passthru report access to nearly every module (MBWorld).
• pyOBD / python-OBD
• SavvyCAN
• OpenGarages / ELM327 tools

Some open Source alternatives

• https://github.com/cedricp/ddt4all
• https://github.com/YangChuan80/KatyOBD
• https://github.com/rnd-ash/OpenVehicleDiag
• https://freediag.sourceforge.io/
• https://github.com/jakka351/GenericDiagnosticTool
• Realtime https://github.com/bgunson/onboardpi
• https://github.com/prithvisekhar/VehicalDiagnosticAlgo
• https://github.com/dchad/OBD-Monitor
• https://github.com/barracuda-fsh/pyobd
• https://medevel.com/ovms3/
• Old https://github.com/shchers/ecu-simulator
• Arduino Honda https://github.com/kerpz/ArduinoHondaOBD
• https://github.com/brendan-w/python-OBD
• https://github.com/stko/oobd
• https://github.com/md-sohrab-alam/android-obd-reader
• https://www.savvycan.com/
• https://sourceforge.net/projects/openobd/
• https://github.com/kees/scantool
• https://github.com/thatlarrypearson/vehicle-telemetry-system
  • Older of the previous https://github.com/thatlarrypearson/telemetry-obd
• https://github.com/fussek/Bluetooth-OBD-II-Diagnostic-Tool
• live OBD-II data, fault code analysis, and offline VIN decoding. https://github.com/provrb/obdium
• OdxTools.
  • https://github.com/mercedes-benz/odxtools https://pypi.org/project/odxtools/
  • https://deepwiki.com/mercedes-benz/odxtools/1-overview
• Freediag https://freediag.sourceforge.io/ https://github.com/fenugrec/freediag/
• https://github.com/mercedes-benz/odxtools

Adapter https://hackaday.com/tag/iso-15765-4-can/

Mercedes Xentry.

A USB-to-OBD adapter with an embedded processor that supports SAE J2534 Pass-Thru (an industry standard used by OEM diagnostic software), CAN, K-Line (important for older Mercedes), KWP2000 and ISO9141.

DTCs (diagnostic trouble codes) PID (Parameter Identifiers)

Mercedes

Mercedes FOSS. https://opensource.mercedes-benz.com/projects/ https://github.com/mercedes-benz

https://www.forum-mercedes.com/img/members/34569/schema-W211-CAN_59-end.pdf

• CAN B, CAN C, CAN D (X11/4)

ISO 15765-4

W211 https://pinoutguide.com/CarElectronics/mercedes_obd2_diag_pinout.shtml

Pin Number	Pin Name	Description
1	K-Line	Ignition control (EZS), air-conditioner (KLA), PTS, safety systems (Airbag, SRS, AB) and some other
3	TNA	TD engine rotation speed
4,5	GND	Ground
6	CAN-high	CAN-High (including AirBag system in W203, W209, W220, W240, R230, С215 after 2004y)
7	K-Line	Engine control diagnostic (ME/MSM/CDI)
8		Ignition,...
9	K-Line	ABS, ASR, ESP, ETS, BAS diagnostic
11	K-Line	Gearbox and other transmission components (EGS, ETC, FTC)
12	K-Line	All activity module (AAM), Radio (RD), ICS, ...
13	K-Line	AB diagnostic - safety systems
14	CAN-Low	CAN
15	K-Line	IC, KI, TAU, LWR diagnostic
16	+12V	Power