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DAS

Erwin — Wed, 05 Aug 2026 12:30:01 GMT

Created page with "DAS, or Diagnostic Assistance System,is the main software used for diagnosing pre-2013 cars. Each component of this software is explained here. == log.dll == Main logger DLL..."

New page

DAS, or Diagnostic Assistance System,is the main software used for diagnosing pre-2013 cars. Each component of this software is explained here.

== log.dll ==
Main logger DLL used by CAL, which in turn is used by DAS.

Writes its logs to LOGGERF.TXT.

=== API ===
{| class="wikitable"
|+
!DllExport
!
|-
|DLL_Log_Init(unused int, unused int, logdir char*, loglevel int, mode char*)
|mode:
- APPEND: write append to the given file

- REWRITE: overwrite the given file
|-
|DLL_Get_Last_Error()
|Returns the last error set by the application
3000: log file already opened
|-
|DLL_Log_Write(unused int, flag byte,
|
|}

== cal_real.dll ==
Called by cal.dll (to toggle between simulator mode and real mode).

Main API to interact with the vehicle.

=== Logging ===
This DLL either logs with DLL_Log_Write, or using SendMessageA on windows with class "MfxTraceWindow" (like Trc2File.exe), and if no window is found, uses OutputDebugString.

=== Configuration ===
{| class="wikitable"
|+LOGGER.INI
used for DLL_Log_Init()
!AppName
!KeyName
!Options
!Description
|-
|LOGGER
|LEVEL
|0
1

2

3 (default)
|Set log level
|-
|LOGGER
|MODE
|REWRITE (default)
APPEND
|
|}
{| class="wikitable"
|+CAL.INI
!AppName
!KeyName
!Options
!Description
|-
|SERVER
|PLATFORM
|PART_D
|
|-
|PATH
|DRIVER
|
|PART_D specific setting, location of the slave.ini file
|-
|SERVER
|CPULOADREDUCTION
|
|Calls CaesarSetOptions("CPULOADREDUCTION=%s") with the given value, if set
|-
|
|
|
|
|}
{| class="wikitable"
|+CABLE_ID.MAP
!AppName
!KeyName
!
!
|-
|
|
|
|
|-
|
|
|
|
|-
|
|
|
|
|}

Main Page

Erwin — Wed, 05 Aug 2026 11:49:39 GMT

OBD2

CAESAR

Erwin — Wed, 05 Aug 2026 11:48:48 GMT

CAESAR

Erwin — Wed, 05 Aug 2026 11:36:45 GMT

Created page with "CAESAR is the library the old DAS software uses to communicate with devices like SDConnect Toolkit. Its main DLL is c32s.dll. == Log configuration == === ceasar_cf.ini === S..."

New page

CAESAR is the library the old DAS software uses to communicate with devices like SDConnect Toolkit. Its main DLL is c32s.dll.

== Log configuration ==

=== ceasar_cf.ini ===
Setting some of these fields will make the logfile report "Developer mode" in the logfile, by sub_10038A90.
{| class="wikitable"
|+Fields read by sub_10038F10 (called straight from DllMain)
!AppName
!KeyName
!Options
!Global variable
!Description
|-
|SETTING
|LEVEL
| -1 (default)
0

1

2

3

4

5
|DeveloperSetting_DebugLevel
|Log level.
|-
|SETTING
|POOL
| -1 (default)
|
|Seems to be unused
|-
|SETTING
|WELCOME
|0 (default)
|DeveloperSetting_Welcome
|Shows dialog on startup with "Start of CaesarConstruct"
|-
|SETTING
|FORCEOUTPUT
|0 (default)
|DeveloperSetting_ForceOutput
| - Forces flush of MessageHook file when something is written<br />
|-
|SETTING
|MESSAGEHOOK
|0 (default)
|DeveloperSetting_MessageHook
|When enabled, tries to find XMLJUnitResultFormatter and .daimler. in the command line arguments, probably the output file.
If no output file was configured, default to caesar_req_res.txt

Starts writing to the file with the following format:

Line;Time;Ecu;Type;Bytes;Info;
|-
|SETTING
|NOSTARTLOG
|0 (default)
|DeveloperSetting_NoStartLog
|Prevents logging configuration setup of %ProgramData%\Mercedes-Benz\Config\DAS\caesar\driver\slave.ini
|-
|SETTING
|FILEMAX
|0 (default)
|
|
|-
|SETTING
|FILENAME
|"ceasar_local.log" (max 260 characters)
|
|
|}

== API ==
{| class="wikitable"
|+
!API
!Description
|-
|CaesarSetDebugOutput(callback func(const char*, ...) int)
|Sets callback function on address 102754D8 for log lines.
|-
|CaesarSetDebugLevel(level ushort)
|Sets debug level on 10312A90.
level can be either 0, 1, 2, 3, or 4.

This level overwrites the loglevel from caesar_cf.inf

Calls CaesarSetDFlowMask with the following options:

0 - 0x0

1 - 0x10000000

2 - 0x30000000

3 - 0x70000000

4 - 0xFFFFFFFF
|-
|
|
|}

Main Page

Erwin — Wed, 05 Aug 2026 11:04:48 GMT

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@@ Line 51: / Line 51: @@
 **[[ICarSoft MBII]]
 **[[Mercedes STAR Diagnostics]]
 ***[[CAESAR]]
 **[[DRB3]]

@@ Line 51: / Line 51: @@
 **[[ICarSoft MBII]]
 **[[Mercedes STAR Diagnostics]]
 **[[DRB3]]
 *[[Data Link Connector]] (also known as OBD2 port)

@@ Line 1: / Line 1: @@
 CAESAR is the library the old DAS software uses to communicate with devices like SDConnect Toolkit. Its main DLL is c32s.dll.
-== Log configuration ==
+== C32S.dll ==
-=== ceasar_cf.ini ===
+===Log configuration===
 Setting some of these fields will make the logfile report "Developer mode" in the logfile, by sub_10038A90.
 {| class="wikitable"
@@ Line 78: / Line 80: @@
 |}
-== API ==
+==== slave.ini ====
 {| class="wikitable"
 |+