CGI vehicle features - AH07.70-P-0002-02V

WARNING: This page does not describe the selected car, but rather 202 other vehicles, including the 2020 Mercedes-Benz SLC300, 2020 Mercedes-Benz SL550, 2020 Mercedes-Benz SL450, 2020 Mercedes-Benz GLA250, and 2019 Mercedes-Benz SLC300. However, it is still accessible from the selected car via links, so may be relevant.

Engine 272.985 DE (direct injection) (CGI)	Engine 272 KE (port injection)
Fuel injection and ignition system ME 9.7 DE Engine control unit located on engine with coolant connections to low-temperature cooling system.	Fuel injection and ignition system ME 9.7 KE Engine control unit located on the engine.
Mixture formation takes place in combustion chamber (inner mixture formation) in two different ways: Homogeneous operation with lambda = 1 in neutral and at high loads, single or double injection Stratified charge operation for partial load with air surplus (lambda greater than 1), double or triple injection	Mixture formation in the intake port and in the combustion chamber, for partial load supported by tumble flaps, Homogeneous operation (lambda = 1), no multiple injection.
Rapidly switching and precisely modulated piezo-fuel injectors located in the middle of combustion chamber, operating voltage up to about 160 V (generated in engine control unit).	Electromagnetically actuated injection valves in the intake port, operating voltage about 12 V.
Fuel supply in low pressure system by means of an electric fuel pump, system pressure regulated from about 3 to 5.5 bar, high-pressure system (up to 200 bar) with quantity regulated high pressure pump (radial pistons), rail with fuel injectors, pressure regulator valve and fuel cooler, fuel line on engine made out of stainless steel.	Fuel supply up to the injection valves by means of an electric fuel pump, system pressure constant at about 3.8 bar.
Fuel pump is actuated by fuel pump control unit by means of a PWM signal according to the required fuel pressure (low pressure circuit). Power supply to the fuel pump control unit via a fuse (F33/f91) on the rear prefuse box (spare tire well).	Fuel pump not regulated, power supply to fuel pump via the fuel pump relay from the rear fuse and relay module.
A spark plug located at exhaust side in the combustion chamber, ignition coil screwed onto cylinder head, short ignition line with spark plug connector. The ignition spark energy is about double compared to engine 272 KE. The ignition output stages are integrated into the ignition coils. In order to avoid misfires in stratified charge operation the spark plug position (position of the overhead electrode) must be achieved. Special tool for detaching the spark plug connector.	One spark plug located centrally with ignition coil plugged straight in. The ignition output stages are integrated into the ignition coils.
TWC heating via mixture adaptation	TWC heating via air injection
Inner exhaust gas recirculation for a large valve overlap and additional external exhaust gas recirculation in stratified charge operation. Regulation of the recycled exhaust quantities by means of electrically driven and cooled actuator motors, recycle rate of up to 30%, position feedback for actuator motor using a Hall sensor.	Inner exhaust gas recirculation for a large valve overlap.
Thermal management with map-controlled three-disk thermostat, shutoff valves for the heating system and the low-temperature cooling system.	Thermal management with map-controlled three-disk thermostat, shutoff valve for the heating system.
Compression = 12.2 (better internal cooling due to direct injection), premium fuel	Compression = 10.7 Premium fuel
Intake manifold with length switch flaps and connection for the exhaust gas recirculation.	Intake manifold switchover for the length of intake routes and tumble flap switchover in partial load operation to influence flow. Position sensors to detect tumble flap position.
Vacuum pump due to dethrottling required.	-
Continuous camshaft adjustment of all four camshaft by a crank angle by up to 40°, adjustment range of exhaust camshaft compared engine 272 KE advanced by a 5° CA, camshaft form at the higher motor speed adapted.	Continuous camshaft adjustment of all four cams by up to a 40° crankshaft angle.
Networking via the engine data bus, interior data bus and an additional sensors data bus with the following subscribers: ME-SFI [ME] control unit, control unit NO _X on the left and right, fuel pump control unit.	Networking via the engine data bus and the interior data bus.
Exhaust system with two 3-way catalytic converters and two additional NO_X storage catalytic converters, each with a temperature sensor and NO_X sensor.	Exhaust system with two 3-way catalytic converters.
O₂ sensor downstream of TWC located in the exhaust pipe after every catalytic converter.	O₂ sensor downstream of TWC located on the side on every catalytic converter.