2001 Mercedes-Benz SLK320 3.2L Engine light is on with no acceleration

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1. Connect scan tool and monitor voltages of pedal sensor B37. Signal 1 (Accelerator pedal position: Idle speed):[0.2...0.5] V Signal 2 (Accelerator pedal position: Idle speed):[0.1...0.5] V Signal 1 (Accelerator pedal position:Kickdown):[4.3...4.8] V Signal 2 (Accelerator pedal position:Kickdown):[2.1...2.5] V 2. If voltages are out of specification verify correct reference voltage to sensor by measuring between pins 6 (Black/White wire) and pin 1 (Blue/Grey wire) on pedal sensor connector. Voltage needs to be between 4.75 and 5.25 volts. 3. Test throttle body voltages with scan tool. Potentiometer #2 signal voltage ignition on, accelerator pedal position CTP 0.3-0.9 VDC, WOT > CTP value Potentiometer #1 signal voltage Ignition on, accelerator pedal position CTP 4.0-4.6 VDC, WOT < CTP value. 4. Test mass air flow sensor voltage. Sensor signal voltage must start KOEO around 1 volt and go up as engine RPMs increase. This can also be seen under air sensor volume output, output value must go up not down. Potential Causes: Pedal Sensor Throttle Body Wiring Tech Tips: With new sensor the throttle stops must be relearned. Use compatible scan tool and perform adaptations. ALWAYS verify charging system voltage is correc