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Car not accelerating

Tiny
BLESSING EWOBOR
  • MEMBER
  • 2000 MERCEDES BENZ C200
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 99,543 MILES
Hello, the car listed above is starting but vehicle is not accelerating, if it does it won't exceed 2 on the tachometer. I have checked the fuel pump and spark plugs, they are working properly. I wanted to scan it but I can't find the OBD port (it has been removed). What other things can I check for?
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Friday, August 28th, 2020 AT 6:00 AM

12 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

I'm not showing a C200. The closest thing I can find is a C230 with the 2.3L.

As far as the DLC, I attached a pic below that shows two locations. Take a look at it and see if it helps. Keep in mind it is from the wiring schematic of a C230.

Now, when the engine idles, is it a smooth idle? Next, if the vehicle is in park or neutral, can you rev the engine beyond 2,000 RPM's?

Let me know
Joe
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Friday, August 28th, 2020 AT 1:19 PM
Tiny
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The engine is not smooth idle, the engine do hesitate but somehow stable at that 2,000 rpm's.
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Friday, August 28th, 2020 AT 1:30 PM
Tiny
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The engine won't exceed 2,000 rpm's, when the vehicle is in park or neutral.
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Friday, August 28th, 2020 AT 1:35 PM
Tiny
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  • MECHANIC
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Chances are it is related to a crank or cam sensor. We need to locate the DLC. I found a pic of where the C class DLCs are located. See if you can locate this on your vehicle.

See pic 1.

Joe
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Friday, August 28th, 2020 AT 8:25 PM
Tiny
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I finally found the DLC, it was squeeze somewhere. These are some codes I found in the ETC.
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Saturday, August 29th, 2020 AT 4:37 AM
Tiny
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Hi,

What brand car is this? The heading says Mercedes and the logo on the steering wheel is a Lexus.

Let me know.
Joe
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Saturday, August 29th, 2020 AT 2:27 PM
Tiny
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It is Mercedes Benz, all the pictures is for the Mercedes Benz except that one with the Lexus logo. If you notice the codes starts from alphabet "P" is for the Lexus while the Mercedes Benz starts with numbers. Please ignore the Lexus, I am still working on that. I really apologise for the inconveniences I have caused you.
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Saturday, August 29th, 2020 AT 9:43 PM
Tiny
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No problem. I was just confused. LOL

You have a ton of different issues. Please keep in mind, I don't have the specifics on the C200. I am using info from a C230.

Since there are several codes indicating implasable readings, it doesn't seem like a sensor issue but instead either a break down in the CAN bus or a connection at the ECM. That is where I would start. I attached what I have. I hope it is the same or similar to what you are working with.

The first pic shows the CAN system schematic. The remaining pics are from the power-train control schematics.

Check for loose connections at the ECM first.

I hope this helps.

Joe
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Sunday, August 30th, 2020 AT 9:24 PM
Tiny
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Thank you very much, but the pics you sent are blur. I don't know if I can get clearer ones.
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Tuesday, September 1st, 2020 AT 11:09 PM
Tiny
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Hi,

Take look at the attached and let me know if you can read them. It is one pic that I broke into 3 parts. Please let me know if that helps. I did overlap them so you can follow it.

Let me know.

Joe
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Wednesday, September 2nd, 2020 AT 6:29 PM
Tiny
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I can see it clearly but that is for the CAN system schematic, what about the power-train control schematic?
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Wednesday, September 2nd, 2020 AT 8:53 PM
Tiny
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Hi,

I thought that is what was needed. LoL

Here are the power-train control schematics. Let me know if this helps. Please remember, these are from a C230.

Joe
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Thursday, September 3rd, 2020 AT 5:11 PM

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