DTC Removal for Mercedes-Benz Continental/Siemens SID ECUs

Learn how to delete DTC codes from Mercedes-Benz SID307/SID310 using WinOLS
The Continental/Siemens SID family (notably SID307 and SID310) appears on select Mercedes-Benz compact diesel models, especially those using the Renault-sourced OM607 1.5 CDI platform. Typical applications include the A-Class (W176) A180 CDI, B-Class (W246) B180 CDI, CLA (C117) 180 CDI, GLA (X156) 180 CDI, and Citan (W415). These ECUs manage high pressure common-rail fueling, boost, EGR, DPF, and on Euro 6 variants,SCR/AdBlue. 

Most Common DTC Codes for Mercedes-Benz SID

These ECUs are robust but strict on emissions diagnostics. The faults tuners most often neutralize include:

1. P0401 – EGR Flow Insufficient
2. P2002 – DPF Efficiency Below Threshold
3. P2463 – DPF Soot Accumulation
4. P0101 – MAF Range/Performance
   (Depending on calibration, P20EE – SCR NOx Catalyst Efficiency and NOx-sensor codes can also appear on Euro 6 cars.)

What Software Is Used?

Professional editing is done in WinOLS, with SID-specific checksum correction. Because SID307/SID310 are Infineon TriCore units with anti tuning protections (password/TPROT), reliable bench/boot tools (e.g., KTAG/KESS3, Flex, Autotuner) are recommended for stable reads/writes and automatic CRC handling.

How to DTC OFF for Mercedes-Benz SID

1. Read the ECU via bench/boot using a tool that supports SID307/SID310 password handling.
2. Open in WinOLS and identify the diagnostic structures (typically 16-bit arrays with linked counters/flags).
3. Map the DTC table and locate the related counters (some strategies mirror entries across banks).
4. Disable only the targeted codes (zero/neutralize the specific flags & counters without disturbing adjacent logic).
5. Recalculate checksums and write back; confirm with a clean scan and a monitored road test.

Why Is DTC OFF Done?

After hardware changes such as EGR OFF, DPF removal/replacement, intake modifications, or when sensors age, SID ECUs will repeatedly store faults and can trigger limp/derate. A precise DTC OFF prevents recurring CEL and torque limitation, keeping the vehicle drivable and consistent, especially valuable for workshops dealing with chronic EGR/DPF or (where fitted) NOx/SCR issues. (Always comply with local emissions laws; for off-road/competition/export use only where applicable.)

Mappack & Support

Our Mercedes-Benz SID mappack includes:

• Verified DTC blocks and label sets
• Counter/flag alignments (including mirrored entries)
• DPF/EGR/SCR areas highlighted
• Coverage for SID307/SID310 across A/B/CLA/GLA/Citan variants

At Schiller-Tuning.com, we’ve helped hundreds of tuners implement clean, reversible DTC OFF on Mercedes SID platforms with professional documentation and file support.