Mercedes Benz repair: loss of power, fuel pump relay, oxygen sensor

Question
i wanna say thanx for all your advice for my 87 me-be 300e. everything worked. recently, i experienced a loss of power/acceleration when i put the car in drive.i had the alternator replaced but its still happening. i ad new plugs,wires,cap and rotor replaced,along with having the coldstart valve and intake valves/manifold and exhaust replaced. have i missed something? thanx! dan williams

Answer
You are entering heavy electrical diagnostic.
Wiring Harness
E.H.A. Valve
Air Temp. Sensor
Altitude Sensor
Oxygen Sensor
Throttle Micro switch
Water Temp. Sensor
Ignition Coil
Reference Sensor
Fuel Pump Relay
Overload Relay

This needs a top notch MB master.
Are you taking the car to MB dealer?