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-   Mercedes C250, C300, C43, AMG (https://www.n54tech.com/forums/forumdisplay.php?f=38)
-   -   JB4 and 2019 FACELIFT (https://www.n54tech.com/forums/showthread.php?t=65644)

mateoosh 06-10-2021 11:50 PM

JB4 and 2019 FACELIFT
HI, greetings from Poland !
Just replacing my RaceChip GTS with JB4 in 2019 C43 (facelifted) which should arrive shortly.

Just wondering, if I should use 2020 firmware (since CANBUS system in FL model is completely different than in previous models) or should I stay with the regular FW ?


Steve @ BMS/Fuel-It! 06-11-2021 11:17 AM

I'd just install it and do a log, then we'll evaluate. ;)

mateoosh 06-21-2021 10:53 AM

1 Attachment(s)
HI again,
Finaly got JBR from CarbonFiberDynamics (thanks guys!) and installed in facelifted (2019) C43. Car was equipped with RaceChip GTS before.
Currently flashed firmware is JB4_MB_C_2020_2.

Well, power delivery is definitely smoother than in RC GTS, however VERY annoying jerks by shifting 1-2 and 2-3 are still there.
Logs are showing clearly, that throttle gets closed pretty hard, no clue why.
Car settings during test: Sport+, ESP in Sport mode (behaves same in disabled mode), fuel EU 98 (93 US), pretty hot 29deg celsius.

Any hints ?

Steve @ BMS/Fuel-It! 06-22-2021 01:50 PM

Have you tried increasing auto shift boost reduction to see if that helps?

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