If you reading everything from the start dhaghighi you will see that the tech replaced everything. Started with the engine wiring harness and all the ignition system and the car is still doing the same thing.

Does it throw off any codes?

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Prost!

Once they've been replaced, they're just as good as the rest. They're not too ridiculously expensive either, especially if you locate a wrecked car with a harness that had already been replaced.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

It throws p0300 with an obd 2 but when the tech check it on the star it says cylinder 2 and 5 not working. he put a new coil and injectors and still misfire

Actually I read that you rebuilt the lower harness.
Is there any old harness or wiring in your engine bay?

If this guy changed all these items to fix the problem, and it is still not fixed, I would really stick-it-to-him. You probably won't have to go to court if you show up with your evidence and present your case to him. If he's smart, he will realize that he will lose to you in court.

These mechanics have to be held accountable....not just change a bunch of parts and cross your fingers.

Now he has no choice now, he should of say if he couldn't fix it instead of chaging all those parts. I hope so because i keep all my receit. It's either he fixed it or take all their parts out and give me my money back if not i'll make sure i ruin their reputation by calling them to street court.

So the last status is that "injectors on 2 and 5 don't work"? Have they been retested? Another thing to make sure is taht the injector seals (o-rings) are good.
By the way, what part of the world is the car in?

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Prost!

The oring in the injectors are good there is no leak no where to be foud. The car is in New York the

Good luck with that. You'll have to take it to a different shop that's willing to sign an affadavit and testify; not likely.

P0300 is a misfire code on multiple cylinders; misfires are most commonly caused by a lean condition (no gas) or can be caused by a clogged exhaust (among many, many other things). I'd use a noid light on the injectors ($20) to make sure they're firing or remove the upstream O2 sensors and drive it to see if driveability improves - if so, the cat is probably collapsed.

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

Hey dhjenkins you said remove the upstream 02 sensor to see if the
driveability increase, you talking about the sensor before the catalytic converter right. The tech still have the car i had a talked with him about taking all the parts out and give me my money back since he can't fix the problem and he insisted that he'll fix the problem to give him sometimes, so we'll see.

Yeah, the one between the converter and the engine. If the cat is collapsed, the exhaust will come out of the O2 sensor bung.

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

Oh alright! I will try that when the tech give me the car if he doesn't fix the problem i'll try that

You can also use an IR thermometer to find extreme temperature differential before and after the cat to determine if it's bad. Some bad cats get so hot they will even start glowing after a highway run.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

Of course, an excess amount of unburned gas going through the cat will make it run extra hot, too; which will, of course, lead to premature cat failure.

I've tried the IR trick, but it's just not reliable enough for me; then again, that goes with the territory when you service multiple makes.

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

Just another suggestion and by no means the only option.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280