ECO Start/Stop, Basic Function - GF07.10-P-1051A

Engine all (CAR) 

Overview 

This document contains information on:

• General 
• Function requirements 
• Function 

General 

For a stationary vehicle, the ECO start/stop function switches the engine off automatically and starts it again, as soon as the driver wishes to drive off. Shutting off the engine when the vehicle is standing still reduces fuel consumption and exhaust gas emissions.

Function requirements 

• Ignition ON (circuit 15)
• Engine management ON (circuit 87M)
• Engine in operation
• Outside temperature between -10 and 40°C
• System diagnosis complete and fault-free
• Speed of 8 km/h exceeded previously during forward travel (manual transmission)
• Indicator lamp in the ECO start/stop function button illuminated

Function 

All of the systems participating in the ECO start/stop function continuously check their status and transmit this to the powertrain control unit and the combustion engine control unit. After the engine stops, the crankshaft angle in the rest position is stored in the combustion engine control unit using the crankshaft angle sensor. When the engine starts, synchronization of the fuel injection system and the ignition system that is otherwise required is no longer necessary due to the stored crankshaft angle.

Upon activation of the Sport Plus mode, the ECO start/stop function is deactivated.

	Function schematics
	Function schematic for start/stop	Engine 139 in model 118, 177, 247	PE07.10-P-2509-97A
	Additional basic functions
	Automatic start, basic function	Engine all (CAR)	GF07.10-P-1052A
	Automatic stop, basic function	Engine all (CAR)	GF07.10-P-1053A
	Combustion engine forced start, basic function	Engine all (CAR)	GF07.10-P-1059A
	Engine shutoff point detection, basic function	Engine 139, 176, 177, 254, 256, 260, 264, 279, 282	GF07.10-P-1063B