Without the corresponding software for the system throwing up codes, the only thing you can do is reboot the ECMs... disconnect the batteries, let them stay disconnected for about 15 minutes, then connect them again.
Code 128 whats is that for. Would it be egr
Attached to the brake pedal.
Need to know WHICH Mercedes engine, as there've been a couple. On an M2, you probably have either the 6.4 or the 7.2 engine.
Need to know the transmission model in order to answer this.
Disconnect the battery, keep it disconnected for five to 20 minutes, reconnect the battery.
If it's OEM installed, it should be directly under the door on the driver's side.
If you have the Detroit motor, you can read the fault codes off the dash. Call them in to any Freightliner dealer or Detroit Diesel mechanic, and they can tell you what those codes are. If you have the MBE4000, Cummins, or Caterpillar motors, you'll need to have the computer hooked up to read off the codes.
ih have detriot serie 60
The Freightliner FL-70 and M2 are both medium-duty trucks, but they differ in design and capabilities. The FL-70, produced primarily in the 1990s and early 2000s, offers a more traditional, rugged design, while the M2, introduced in the early 2000s, features a more modern aesthetic and enhanced driver comfort. The M2 typically boasts better fuel efficiency, improved safety features, and a wider range of engine options compared to the FL-70. Overall, the M2 is seen as a more advanced and versatile truck suitable for various applications.
If it has one, it'll attach to the engine at the bottom of the oil pan, and, on some engines, the right side of the block.
The best way is to identify the cause of the faults, and fix them. If you need to reset the ECM, disconnect the positive from the battery, let it sit for at least five minutes, then reconnect the battery.
Bad fuse, bad relay, bad switch, bad wiring... take your pick.