Mercedes Zero Quantity Calibration
Supported coding features by StarCOM diagnostic tool https://www.obdtester.com/starcom
What it does
- Sets the baseline (zero) injection quantity for fuel injectors
- Ensures precise fuel delivery and engine efficiency
- Synchronizes ECU with injector characteristics
When it is required
- After replacing fuel injectors
- After engine control unit replacement
- After injector cleaning or rail repairs
- When fault codes related to fuel delivery or misfire are present
Conditions that must be met
- Engine off, ignition ON
- Stable battery voltage
- Fuel system properly installed and primed
- No active critical engine fault codes
What happens during calibration
- ECU measures or sets zero fuel quantity for each injector
- Injector offsets are stored
- Engine ready for accurate fuel injection under all conditions
If calibration is not performed
- Engine may run rough or misfire
- Poor fuel efficiency
- Fault codes or warning lights may remain
- Potential increased emissions and engine wear
After calibration
- Verify injector adaptation values in live data
- Start engine and monitor idle and load response
- Confirm no fuel-related warnings or error codes