LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2012 >> C250 Base >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Throttle Control, Speed Control Systems -- 204 C Class >> Basic Knowledge >> Electronic accelerator function - GF30.20-P-3015MI
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Electronic accelerator function - GF30.20-P-3015MI

ENGINE 272.9 (except 272.982) in MODEL 204.0/2 as of model year 2009 

ENGINE 272.9 (except 272.983) in MODEL 212 

ENGINE 272.9 (except 272.984) in MODEL 207 

ENGINE 272.9 in MODEL 204.9 

ENGINE 273.9 in MODEL 207, 212 

Function requirements for the electronic accelerator, general points 

Electronic accelerator, general points 

The electronic accelerator (EA [EFP]) function is integrated into the ME-SFI [ME] control unit (N3/10) and controls the opening angle of the throttle valve depending upon the driver input and the operating conditions.

The ME-SFI [ME] control unit regulates the throttle valve position according to the following sensors and signals:

The requirements of the torque coordination function are also taken into account.

Function sequence for electronic accelerator 

The function sequence is described in the following steps:

Function sequence for throttle valve actuation 

Depending on the accelerator pedal sensor, the ME-SFI [ME] control unit actuates the throttle valve actuator (M16/6) according to a characteristics map. To do so, the ME-SFI [ME] control unit actuates the actuator motor (M16/6m1) in the throttle valve actuator with a pulse width modulated signal (PWM signal). Provided there are no limiting functions active (for example, cruise control request), the opening angle of the throttle valve is determined by the accelerator pedal position alone. The actual value potentiometers 1 and 2 (M16/6r1, M16/6r2) report the current throttle valve position to the ME-SFI [ME] control unit.

Function sequence for throttle valve damping 

The ME-SFI [ME] control unit controls the throttle valve damping according to the following sensors and signals:

The purpose of throttle valve damping is to delay closing of the throttle valve down to idle speed range if the accelerator pedal is suddenly released. In this way, the engine torque reduces slowly and the vehicle does not slow down with jerks.

Function sequence for reverse travel 

If the ME-SFI [ME] control unit receives the reverse travel CAN signal, the ME-SFI [ME] control unit opens the throttle valves slowly and limits the maximum opening angle to about 50%. This optimizes ride comfort and driving safety when reversing.

Function sequence for adaptive accelerator pedal 

The ME-SFI [ME] control unit recognizes how the accelerator pedal is being actuated and switches between two characteristic curves. After a 50% pedal travel, about 80% of the engine load is released for a sporty driver and 40% of the engine load is released for a relaxed driver. There is no further difference felt above a pedal travel of about 90%.

IMPORTANT If the calm driver characteristic is active (for example, after a long journey on the freeway), the accelerator pedal at first has to be pressed unusually far in order to obtain high acceleration.

Further functions which support the electronic accelerator and which are described in other documents are:

  Electrical function schematic for electronic accelerator MODEL 204 PE30.20-P-2050-97FAC 
MODEL 207 PE30.20-P-2050-97EAB
MODEL 212 PE30.20-P-2050-97DAB
  Overview of system components motor electronics (ME-SFI) fuel injection and ignition system   GF07.61-P-9997MI
scientia non olet · About LEMON Manuals