2006 E320 CDI
Please read the provided MB document carefully - it says:From my understanding of the diesel engine description posted above, this is only true for the OM651 engine. This uses piezo operation with 24 digit adjustment code, and replaces the OM 646 solenoid operation with 18 digits.
" I2C coding:
On engine 651 with the new CDI system, the coding has been extended to a 24-digit I2C code. The I2C coding permits even more accurate tuning (injection quantity and injection period) of the individual piezo injectors when new.
If a piezo injector is replaced, the CDI control unit must be supplied with this coding via Star Diagnosis. It must be ensured that the correct I2C codes are entered after replacing the injectors. If the I2C codes are entered incorrectly or not at all, the following problems may arise:
• Smoke formation
• Rough or vibrating engine
• Power loss
• Generation of noises"
Following the introduction of the following engines:
engine 648 as of engine end number: 064541
with CDI 3 1600 bar system converted for these engines to IMA coding (Injector Quantity Compensation).
These injectors also show the marking of the magnet group, a 6-digit number-letter combination (see bordering in picture), similar to
the injectors of the CDI 2 system.