It is winter now, but active season is not so far ahead so look right time to share something about my plans for this year and what have been prepared for it 🙂.
As I said in previous post, I’m not so happy with range of used external MAP sensor, especially its lower limit - 50kPa. I see in the logs periods right at 50kPa, where it is actually below it and correspondingly AFR is richer than desired. Some additional functionalities of ECU was implemented to combat this last year, but it is not optimal solution for sure and cannot replace receiving correct MAP signal in these low load areas. So, I want to try another MAP sensor with more pleasant range for my car. The goal is also to be OEM and readily available, which will be good if needing replacement in the future. After some research, I think that found one, which look, that probably will have desired range for my car and order it. After that I order correct corresponding plug for it.
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From what I see this sensor is used on A45 AMG with 360 and 381hp and other Mercedes and generally this type of MAP sensors are used on many Mercedes. I cannot find clear specification of it, but in details and numbers I see BOSCH (DS-S3 20 - 350kPa), from which I assume and expect it to be with range 20-350kPa, which is what I’m looking for. Also, I read that these A45 AMGs run 1.8bar max from factory so wouldn’t be surprising if they use such range MAP.
Specific pins for connecting plug are needed and I found TPMS plug kit, which look to use same type of plugs and at a good price.
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After receiving it I found that plugs from above kit are lower quality and not absolutely the same as the one, which I bought earlier. Locking flap/door on plugs from kit look to be a little bit more inside and cannot click/lock on sensor and I try to show it with below comparison.
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I cannot say for sure, that plugs from this kit will fit the same way in its original TPMS purpose, but other plug look better quality to me and I cannot see how result will be different. All have really snug fit on MAP sensor.
So, from VAG sourced parts to Mercedes sourced ones, I think is a good move 😀. This is the most complicated 3pin automotive plug, which I have seen until now I think 🙄.

This post become longer than expected, so will continue in new one 🙂