Air Mass Dilemma

[clk320x4]

Greetings, everyone.

I am receiving many trouble codes on my 2010 E350.


The initial focus is on the Air Intake Temperature sensor, which I intend to replace due to the original appearing contaminated, and the cost is sufficiently low.

I was informed that the codes are associated with a defective MAF sensor.

Enclosed are the codes and the real-time readings from my Maf sensors.

Unplugging sensor B results in a value of 0g. Upon disconnecting Sensor A, the readout displays 166g, while Sensor B subsequently increases to 8g.

I am willing to invest in a replacement MAF sensor, but I seek guidance before making any purchases.

[clk320x4]

I have recently replaced the temperature sensor, and I am not surprised that it did not resolve the issue.


I have observed that when I disconnect Sensor A, its temperature remains at 79°C whereas Sensor B decreases to 21°C.
Upon disconnecting Sensor B, both temperatures stabilise at 79°C.

The subsequent course of action appears to be attempting a costly MAF replacement, unless someone possesses other insights.

[AMG33D]

How is it functioning?Whenever I have experienced MAF failure, the vehicles operated quite poorly.

[Chrishazle]

It is uncertain if this information would be beneficial, however when my MAF sensor went down due to a missing fuse, a prominent characteristic was difficult upshifts. If your vehicle is an automobile and you are encountering the same issue, it likely indicates a malfunctioning MAF sensor. - supposing that MB configures the gearbox ECU to default to elevated line pressures in the absence of MAF sensor data, as indicated by my 4L 80E.

[Rojoires]

Is it necessary to code a new MAF sensor, or is it a plug-and-play component?

[Rojoires]

https://www.ebay.co.uk/sch/i.html?_nkw=maf sensor&campid=5338181132&customid=2518X1570512X96b92f06d27220efcdfdfda1c194c2cf&mkcid=1&mkrid=710-53481-19255-0&subId2=15&toolid=10001

[clk320x4]

I apologise, everyone. I did not receive notifications regarding your responses.

I ultimately resolved the issue. The MAF was indeed defective. I purchased a pre-owned Y-Pipe in superior condition than mine, which included one MAF. I transferred my functional MAF to it, and it registered the accurate temperature and airflow measurements.


Nonetheless, I occasionally have a minor hitch after startup. During discussions with Avantgarde in Clevedon, they indicated that the adjustments must be recalibrated for optimal performance. The issue is that I currently reside in Scotland, necessitating the search for a reputable independent establishment in Edinburgh. All nearby garages I have approached have provided a standard quotation of approximately £90 for one hour of service. It would be more advantageous for me to purchase a superior fault reader than to spend two minutes having them reset it.

[Rojoires]

You may reset it by disconnecting the negative battery terminal for 10 minutes.

[clk320x4]

Disconnected the negative terminal for 20 minutes while replacing the fuel filter today. It is currently idling more effectively.

[Ortsmatt]

It is advisable to inspect all o-rings and seals on the turbo outlet (aluminium pipe) leading to the resonator (plastic box at the front of the engine) and the intercooler. I believe your 2010 model possesses the same or a very similar engine as my 2009 E280. I recently completed all my maintenance, and the performance has significantly improved; I previously underestimated its condition, but I now recognise the sluggishness in throttle response and downshifts.

Some of these seals may have been compromised during the installation of the new intake; this is how I realised mine required attention, as I subsequently experienced a check engine light owing to many leaks, including a boost leak at the intercooler pipe.


I wanted to bring this to your attention, although you may already be aware.

Here is a highly beneficial link that I utilised

Edited 21 hours ago by Ortsmatt

[clk320x4]

Indeed, I completed all necessary tasks when I replaced the thermostat, so I believe I am adequately prepared in that regard. I observed typical oil spots around the seal positions, which had been improperly installed. It appears that the new MAF required calibration in my situation.