320 CDI. Where are fuse blocks located?

Question edited for a lot more clarity.
Question moved to model category.

These things have fuses boxes all over the place and are a nightmare to work on :>D

Fuse Box Diagram Mercedes-Benz M-Class (W164; 2006 ...

https://fuse-box.info > mercedes-benz > mercedes-benz-...

Here you will find fuse box diagrams of Mercedes-Benz ML280, ML300, ML320, ML350, ML420, ML450, ML500, ML550, ML63 2006, 2007, 2008, 2009, 2010 and 2011, ...

Fuses W164 M-Class 2006-2011 Diagram, Box Location ...

https://www.mercedesmedic.com > fuse-box-location-d...

Fuse locations on Mercedes-Benz M-Class W164 2006-2011. Main fuse box and relay box is located in the engine compartment. Rear, passenger side in the trunk.
Model: ML 320 CDI ML 320 BLUETEC ML 350 ...
Years: 2006 2007 2008 2009 2010 2011
Chassis: 164
Make: Mercedes-Benz

Fuses W164 M-Class 2006-2011 Diagram, Box Location ...

https://mbworld.org > attachments > m-class-w164
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Fuse locations on Mercedes-Benz M-Class W164 2006-2011. Main fuse box and relay box is located in the engine compartment. Rear, passenger side in the trunk.
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It sounds like you got a short circuit somewhere, you can try replacing the fuses and see if it happens again.

First check the 15 amp HVAC fuse located in the main fuse block inside the car on the passenger side of the center console, under a cover. If the fuse is good, then the problem may either be the HVAC blower switch (which is the fan blower selector switch), the fan blower motor resistor, or the fan blower motor. An auto repair manual will explain and illustrate for you the steps on how to check each of these components.

Even after pushing the ac light switch on, the fan blower selector switch has to be turned on as well (working) because it provides an electrical path to the positive side of the battery to complete the circuit and turn the ac light on. What the ac light switch does is provide the electrical path for the ac compressor clutch to come on through the ac control relay which is controlled by the car's PCM(computer) when you want ac, but the ac light switch still needs to run through the fan blower selector switch to receive its power. You can turn on the fan without the ac light switch because it gets its ground path(negative) from the blower motor. So the blower motor has to work in order to provide a ground path for the fan blower selector switch to be functional. You could have a faulty blower motor which is why no air blows through the vents. The fan blower motor is located inside the car on the passenger side underneath the dash at the bottom end of the glove compartment box. You'll see it. It's right above where a person rests their feet on the floor. Therefore, if your 15 amp HVAC fuse is good, check to see if you have voltage at the blower motor connector. Unclip the connector and with the ignition on and the fan blower switch moved to any one of the first 3 selections, check for voltage using a multimeter. The voltage will vary because there is a blower motor resistor. Voltage should be higher on setting 3 than 1. If you do have voltage at the blower motor connector, check for a faulty blower motor. The auto repair manual will tell you how to do it using jumper wires.

It's normal that your car is running hot because the radiator fan works in conjunction with your ac compressor. If the ac is on, the radiator fan will be on and therefore the engine coolant temperature will stay in it's normal operating range. If the ac is off, the radiator fan will stay off as well and the engine coolant temperature gauge will begin to rise and show pretty hot (especially at idle). It will do this up until a certain degree then the radiator fan should turn on thermostatically and stabilize the temperature. It's scary and I know what your saying because it does that to my car if my ac isn't on. Don't worry it won't overheat.

if the lower fan speeds dont work but the fastest speed does the heater fan resistor block needs replacing. If the highest fan speed doesnt work leave it on there and check for power at heater blower fan, if power is on one wire and the other is an earth the blower motor fan needs replacing. Use a normal globe test light to check this. If no power on any wires to fan go back and check all fuses in car and under bonnet with same test light. If fuses are ok possible open circuit wire to fan.

I have had the parking lights on my 1998 forester stay on w/ no way to turn off. Used the remote door lock to lock and unlock car and the lights went off?????????? This has happened twice with the same solution

Hmm, a problem that I have not encountered before. My best guess is that some component within the heater setup is getting overheated and then it shuts off to avoid further damage. If the heater runs each time you start the car and then turns off during your travels, then this might be the case.

Secondly, there are circuit breakers located in the fuse box. These are silver and are about twice the size of a standard fuse. Unlike a standard fuse that blows once and is done, circuit breakers get hot and "trip". After they cool down the connection is made again. Look to see if a circuit breaker (sometimes labeled CB) is in the fuse box and serves the heater. You may want to get a new one.

check fuse panel and on the lid of panel it should give you numbers and diagram of fuses

THE HEATER AND BLOWER RELAY. IS LOCATED ON THE BLOWER MOTOR HOUSING IN THE PASSENGER COMPARTMENT.ON 1999 THROUGH 2002 MODELS. AND IN THE FUSE RELAY CENTER IN THE ENGINE COMPARTMENT.ON 2003 AND LATER MODELS THE HVAC FUSE IS LOCATED IN THE FUSE RELAY PANEL UNDER THE LEFT SIDE OF THE DASH.

possible faulty heater resistor block or control head

hi,main fuse box or e-box is located in right side,standing in front of your car,you can use the remover for busted fuse,some ml model one fuse is under the fuse box(cdi management)ty