M_M

I wanna reset my ecu but don't want to disconnect the battery as I don't wanna setup all the settings in my car.

could I just unplug the ecu for a while to reset the ecu? or anything I can do with the fuses?

M_M

nobody knows?

Zeppelin

I have un-plugged my battery numerous times and never had to set up anything after that. Don't un-plug the ECU with the battery connected or you will be sorry.

Trekman

yup just unplug the battery... what are you trying to do?

E55AMG99

On earlier cars like the 300E, you could pull one of the fuses to drop power from the ECU. I'm not sure which one it is on newer models but you should be able to find it.

M_M

thanks for the replies.

I wonder if I disconnect the battery for like an hour, all the settings(memory seat positions, time, radio, and ESP) will remain the same?

I am gonna install the pulley, so better reset the ecu to let it apdot the new air-flow changes.

Trekman

10 min would do it. it will clear it. you will need to turn your steering wheel left and right to set the ESP and your windows up and down and the sun roof.

ProjectC55

I 've done that several several times and had no problems.

M_M

in fact, i have done that more than several times on my pervious s4 without any problems as well.