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Diagnostics yields DTC 0105 Manifold Absolute Pressure/Barometric Pressure Circuit but I can't find a MAP sensor in the Benz EPC, nor have I been able to locate such a sensor on the inlet manifold. Is the diagnostics pulling my leg or is there a very well hidden MAP sensor lurking about somewhere?

The car is a RHD 1998 W140 S420 and M119.981 is the engine with the direct ignition and fly-by-wire throttle controlled by Motronic V1.

The problem I am trying to fix is a consistent misfire that is particularly noticeable at idle when cold, but is present in all conditions.

Any info on this DTC or the MAP sensor in general would be of value.
 

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1998 140.070 CL500, 1966 406.121 U65
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1,489 Posts
The problem I am trying to fix is a consistent misfire that is particularly noticeable at idle when cold, but is present in all conditions.
Consistent as in every cycle? If so, try to disconnect coils, one by one,
until you it gives not change. When you then have found the cylinder,
swap coils with another cylinder to find out if it is the coil or spark plug.
I think, that the code you are given, could just be a consequence of the misfire?

br,
syljua
 

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Premium Member
1998 140.070 CL500, 1966 406.121 U65
Joined
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1,489 Posts
As for the MAP sensor, I think you have one at the front of the manifold.
Next to the cooling temp sensor;
Êàòàëîã
Does not say, if it is 62 or 66 in that drawing (it names neither, just "sensor").
Do compare with the harness drawing, part 295;
Êàòàëîã

Oh, I miss the Star Finder web interface that the, now removed,
classic-roadster.de had... Much easier to show parts location there.

br,
syljua
 
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