Speed Control, Basic Function - GF30.30-P-9901A

Model all (CAR) 

Overview 

This document contains the following information:

• General 
• Function requirements 
• Function 

General 

The speed control automatically accelerates and decelerates the vehicle to a specified value and holds this constant. The driver can remove his foot from the accelerator pedal. Speed control ensures relaxed driving. It is activated as soon as the driver defines a speed value.

Function requirements 

• Engine running or drivetrain operational
• Vehicle in forward travel
• Vehicle speed over 20 km/h

Function 

The speed control adapts the vehicle speed to the specified speed value and holds this constant. In doing so, speed control accelerates or decelerates the vehicle.

If the driver accelerates the vehicle with the accelerator pedal (e. g. to overtake), the set specified speed remains stored. Once the foot is removed again from the accelerator pedal, the speed control returns the vehicle to the stored speed value.

Vehicles with Driving Assistance Package: 

Indicated speed limits registered by the traffic sign recognition system or location-related limitations from the navigation system can be adopted as the specified speed.

Shutoff conditions 

Speed control shuts off under the following conditions:

• Brake pedal operated
• Electronic Stability Program (ESP®) shut off
• ESP® regulating
• "Brake" request from a different vehicle assistance system
• Vehicles with manual transmission:
  • Very low engine speed
  • Engine speed near the maximum engine speed
  • Transmission in neutral
  • Clutch pedal operated

	Function schematics
	Regulate speed, function schematic	Model 118, 167, 177, 213, 238, 243, 247, 257, 290, 293 except code 239 (Autonomous intelligent cruise control Pro (DISTRONIC PRO)) except code 23P (Driving Assistance Package) except code P20 (Driving Assistance Plus Package)	PE30.30-P-2501-97A
		Model 118, 167, 177, 213, 238, 243, 247, 257, 290, 293 with code 239 (Autonomous intelligent cruise control Pro (DISTRONIC PRO)), with code 23P (Driving Assistance Package) or with code P20 (Driving Assistance Plus Package)	PE30.30-P-2501-97B
		Model 206, 223, 297	PE30.30-P-2501-97D
	Subsystems
	Increase speed, basic function		GF30.30-P-1000A
	Reduce speed, basic function		GF30.30-P-1001A
	Traffic sign recognition, basic function	Model all (CAR) with code 513 (Road sign recognition system)	GF54.30-P-9901A
	Additional basic functions
	Direction of travel selection, basic function	Model 243, 293, 297	GF08.00-P-1002A
	Gearshift system, basic function	Model all with transmission 725.0/1	GF27.60-P-1002B