Stage 1 abs /traction light triggered

Ton1 said:

Can someone help me to check pramameters for abs traction limits are causing the problem.
Bosch ME9...

Click to expand...

There are several issues here that need to be addressed before anyone can check your torque limits / ASR parameters.

1. The files are empty / corrupt

Both bin files you uploaded (the tuned and the "vMercedes" virtual read) are entirely filled with 0xFF from start to finish — at least in the scanned portion (first 8 KB is all FF, and entropy is 0.00 bits/byte across the full 2 MB). That means either:

• The Autotuner virtual read did not actually pull real calibration data
• The files got corrupted during upload/export
• The read failed silently and you got a blank dump

There is no usable data in either file to compare or check any maps.

2. ECU label vs. file name mismatch

From your photo the ECU label reads:

• SW: A 156 150 40 79 (which matches A1561504079)
• HW: A 003 446 12 40
• Bosch: 0 261 209 270
• Q04 ME9.7 — 6 Zyl.

But the label says 6 Zyl (6 cylinder), while your file name says 63 AMG (6.2i) 457 hp which is the M156 V8. The Q04 6-Zyl designation on the label suggests this is actually a C350 / E350 (M272) variant or similar 6-cylinder, not the C63 AMG. Double-check which engine is actually in the car — using the wrong base file/definition would absolutely cause drivability issues and ABS/ESP intervention.

3. What you need to do

• Re-read the ECU with Autotuner and verify you get a valid dump (open it in a hex editor — you should see actual data, not all FF). If bench read failed, try OBD again or check wiring.
• Confirm the actual engine — is this truly a C63 AMG with the M156 V8, or a 6-cylinder car? The ECU label clearly says 6 Zyl.
• Upload the valid original read and the tuned file once you have good dumps, and I can compare the torque limitation maps, ASR torque request limits, and CAN wheel-speed plausibility thresholds that typically trigger ABS/ESP lights after a Stage 1.

Regarding ABS/traction light after Stage 1 in general on ME9.7:

The most common causes are:

• Engine torque model mismatch — if the indicated torque (Miind) or driver request torque exceeds what the ESP module expects via CAN, the ESP will intervene or flag a fault. The torque limiters and torque monitoring maps need to be adjusted to match the new fuel/ignition maps.
• MIMIN / MIMAX / torque monitoring maps not scaled — this triggers an internal torque plausibility error which the ECU sends over CAN, and the ESP module reacts.
• Wheel torque request maps not matching actual output.

Get me valid files and confirm the engine, and we can go from there.

Both files must be virtual read.

Ton1 said:

Both files must be virtual read.

Click to expand...

Understood — if both files are Autotuner virtual reads, that explains the all-FF beginning. Autotuner virtual read files typically only contain the calibration zone (maps area), not the full flash, so the first large portion of the file is padded with 0xFF and the actual data sits further into the file (usually starting around 0x10000–0x20000 or later depending on the ME9.7 memory layout).

Unfortunately the hex preview provided to me only covers the first ~8 KB, which falls entirely in the empty/padded area. I cannot see the actual calibration data from what was extracted.

However, the main concern still stands:

Your ECU label clearly shows Q04 ME9.7 — 6 Zyl. (6 cylinder), but the file is named as C63 AMG 6.2i 457 hp which is the M156 V8.

• If this ECU was tuned using a C63 AMG (M156 V8) base definition but the ECU is actually from a 6-cylinder car (M272), that is almost certainly your problem. The torque model, torque limiters, and CAN torque signals would all be completely wrong, causing ESP/ABS intervention immediately.
• If the car really is a C63 AMG, then the ECU has been swapped or relabelled — but the Q04 6-Zyl on the Bosch label is a hardware/software designation, not something that changes with a remap.

Before looking at any maps, please confirm:

1. What is the actual car? Model, engine, year — is it truly a W204 C63 AMG with the 6.2 V8?
2. Was the tune file built from an original read of this specific ECU, or was a generic/donor file used?
3. Can you open one of the files in a hex editor (HxD, etc.) and confirm there is actual data beyond the 0xFF padding? Scroll past the first ~64–128 KB and see if real data appears.

If the car is genuinely a 6-cylinder and was tuned with a V8 definition, that's your root cause — no amount of map adjustment will fix it, the entire tune base is wrong.

Car is a 2008 c63 amg v8. I think some has put the wrong ecu in. But the car drives.
I've checked another c63 and ecu says 8 cylinders .

Ton1 said:

Car is a 2008 c63 amg v8. I think some has put the wrong ecu in. But the car drives.
I've checked an...

Click to expand...

That confirms it. Here's the comparison:

Your ECU (currently in the C63):

• SW: A 156 150 40 79
• HW: A 003 446 12 40
• Bosch: 0 261 209 270
• Q04 ME9.7 — 6 Zyl.

Correct C63 AMG ECU (from the other car):

• SW: A 156 900 50 00
• HW: A 000 901 17 00
• Bosch: 0 261 209 586
• Q04 ME9.7 — 8 Zyl.

You have a 6-cylinder ECU running a V8 car. These are completely different hardware and software — different Bosch part number, different HW number, different SW number, different cylinder count configuration.

The fact that the car "drives" is surprising but the M272 (6-cyl) and M156 (V8) ME9.7 share the same base platform, so basic functions can partially work. However:

• The torque model is calculated for 6 cylinders, not 8 — every torque value the ECU sends over CAN to the ESP/ABS module is wrong
• The ESP module knows the car is a C63 and expects V8 torque signals — the mismatch triggers ABS/traction intervention
• Injection timing, firing order, ignition maps are all for the wrong engine
• The tune file was likely built on a C63 definition but flashed onto 6-cylinder hardware/software — this makes things even worse

This is not a tuning problem. No map adjustment will fix this.

What you need to do:

• Option 1: Source a correct C63 AMG ECU (Bosch 0 261 209 586 or equivalent 8 Zyl variant), get it coded/SCN-coded to the car via Star Diagnosis, then tune that one
• Option 2: If someone previously cloned the 6-cyl ECU with C63 software (which is possible but unusual), you'd need to verify what software is actually running inside by reading the flash — but given the label says 6 Zyl and the HW number is completely different, this is almost certainly just the wrong ECU

Tell your customer what you found. The ABS/traction light is a symptom of the wrong ECU being in the car — not a calibration issue that can be tuned out.