ENGINES 642 in MODEL 164.8/1, 203.2, 251.1, 203.0, 251.0 up to model year 2008/YoM 07

ENGINES 642.9 in MODEL 463

ENGINES 642 in MODELS 211.0/2, 219.3, 211.6, 209.3/4

A functional requirement for the AC compressor shutoff function is the AC system is running. The CDI control unit (N3/9) receives the message "COMP_ON" (refrigerant compressor (A9) activated) over the Controller Area Network bus Class C (engine compartment) (CAN-C) from the EIS [EZS] control unit (N73). Where the following requirements are met, the CDI control unit interrupts actuation of the refrigerant compressor:

Engine speed < 2000 RPM
Value of the accelerator pedal (B37) > 95 %

If the conditions for the AC compressor shutoff function are no longer satisfied, then the refrigerant compressor is reactuated by the CDI control unit.

Component description for crankshaft Hall sensor	B70	GF07.04-P-6220P
Component description for CDI control unit	Model 203, 209 N3/9	GF07.16-P-6000P
	Type 211,219 N3/9	GF07.16-P-6000T
	Model 164, 463 N3/9	GF07.16-P-6000GZ
	Model 251 N3/9	GF07.16-P-6000RT
Accelerator pedal sensor, component description	Model 203, 209, 211, 219 B37	GF30.20-P-2010P
	Model 164, 463 B37	GF30.20-P-2010GZ
	Model 251 B37	GF30.20-P-2010RT

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

CDI AC compressor shutoff, function - GF07.16-P-3010P

Use the Manual With the Right Hardware

When to See a Mechanic