As a Class 6/7 single axle truck, they're fine, although I'd probably opt for the Ford F650/F750 for that application, instead. More places available to service those.
As a Class 8 truck, I believe engine options include the Cummins ISM, which is an 11 liter engine, so it's good for vocational applications, local P&D, stuff like that.
Spacious cab, pretty easy to maintain and work on. Sometimes you'll hit electrical issues, but they're no worse for them than the competitors.
The M2 family ranges from Class 5 to Class 8 trucks... weights vary greatly throughout, not to mention there's the matter of configuration (e.g., box van, dump truck, etc).
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.
If it's OEM installed, it should be directly under the door on the driver's side.
Disconnect the battery, keep it disconnected for five to 20 minutes, reconnect the battery.
Code 128 whats is that for. Would it be egr
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.
Bad fuse, bad relay, bad switch, bad wiring... take your pick.
It should be underneath the driver's side door, unless it either doesn't have one, or else the block heater is an aftermarket installation.
Question's a bit too vague to be answered with any certainty. Most likely, you either have a short somewhere, or a bad relay.
The answer will depend on the paint as well as its coverage.