the below code information was kindly provided by another poster. After changing out the glow plugs in my 96 e300d, and after putting everything back together, I ended up with an error code of P0200. Upon further investigation, I found that during the process of changing the glow plugs, I must have broken one of the wires that control the switchover valve on the underside of the intake manifold, which caused the code to come up. Repaired the wire, and all was well:





The generic reader code P0200 can come up as a result of the following MB specific codes from stealership or a good independant MB shop:
P1220=Fuel quantity actuator (IFI) (Y23/1)
P1223=Fuel rack position sensor (Y23/1l1)
P1475=Resonance intake line switchover valve (Y22/7)
P1476=Resonance intake manifold switchover valve (Y22/6)
P1611=IFI control module (N3/7)
P1613=IFI control module (N3/7)
P1614=IFI control mudule (N3/7) or fuel metering actuator (Y23/1k1) or fuel rack position sensor (Y23/1l1)
P1617=control module not coded
P1622=Electohydraulic shut-off actuator (Y1/1)