Was having problems with original starter "kicking out" before starting engine, so I replaced starter. Now when key is turned on, I don't hear fuel pump run at the beginning for 2-3 seconds like before. Engine will turn over and over but doesn't start at all. Theft system light is on now, but don't remember if it was on before, prior to always starting for indiacator lamp check process. Have checked all fuses under hood and in fuse box for bad fuse, but all are have power going thru it. Tried disconnecting batery overnight, but same no start condition.
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why did you replace starter ?? was it for the same problem you are having now? if so than remove starter or flywheel inspection cover on bottom of engine and check for faulty flywheel gear .. if not the original problem then return the starter for another one ..
There are several things you need to check. Start by checking the alignment between the pinion gear of the starter and the flywheel. If that is loose or binding the starter will do this. Next, check teh starter relay to make sure it isn't faulting out. finally, if you have an Alarm installed, cut the power wire to the alarm or pull the fuse to make sure it isn't the Anti-Theft circuit malfunctioning and stopping it from starting.
Sounds more like a dead battery. The one click you hear is the starter solenoid.
Turn on your headlights and try to start if your headlights go real dim your battery is dead.
If they stay bright then it could be your starter
Thoroughly check the battery to chassis to engine ground system is properly connected and in good order.
Check/replace any solenoid control relay if fitted -(slave relay interfacing between ignition start sw and starter motor engage solenoid).
Check condition and connections of any fusible link (or in line Maxifuse).
i Is the engine wire harness original? or has it already been replaced? if its original, this may sound crazy unless you already know that MB has a big problem with the wires under the hood.
But your car may need a new engine wire harness. They start to crumble leaving the wires bare in places to short together and cause all kinds of crazy things. Your car is at the perfct age to start experiancing this problem. Unfortunetly the best way to cure this is to replace the harness. A harness costs about $900 new, plus labor. To check the harness, I unwrap the wires in several places on top of the engine by the injectors, and for the ignition coils and a few other places, I then bend the wires around a little, and look for cracking or crumbling. If you see ANY cracks in the insulation, that is not good . To replace the harness is acually easier than it looks. it takes one to two hours, even less if you done one before. There is a high percentage of the MB that I have seen, have this harness problem..