Radio come on but no sound, I check fuse is there a fiber optic fuse or what could it be?
I will provide you with the radio wiring diagram to use for diagnostics. If the problem is internal in the radio, replacing it would be the fix.
Radio Wiring Diagram – 2004 Mercedes ML500 (best viewed in Google Chrome Browser)
2004-mercedes-ml500-sound-systems-base-radio-circuit-1-of-1
It will turn over but will not fire.
We have developed a no start diagnostic chart for just this situation.
Upon heavier braking, like an off ramp from an interstate, the car runs on 3 cylinders. If it is cut off and restarted, it runs fine. Thinking a fuel filter problem.
I can’t find owner manual anywhere
RESPONSE
Your vehicles owners manual may be viewed online. Here you go:
Free Car Owners Manuals follow the Mercedes tab, not sure but they might only go as far back as 2000. You may need to contact a dealership service department.
I need the front SAM Module wiring diagram.
RESPONSE
NOTE* After installing a new unit, it needs to be reprogrammed.
MARCH 2008 — Mercedes-Benz is recalling 3,283 MY 2008 S-Class and CL-Class passenger vehicles. A malfunction may occur on the Signal Acquisition and Actuation Module-Front (SAM-F) transistors. The SAM-F is a double transistor that helps control vehicle functions and the lighting of the center console. Incorrect storage of the transistors led the transistors to be exposed to excess humidity. The presence of this moisture in combination with the thermal stress during the “reflow soldering” may have damaged the transistors while could prevent them from properly functioning increasing the risk of a crash. Dealers will inspect and replace all potentially affected SAMs. The recall is expected to begin during May 2008. Owners may contact Mercedes-Benz at 1-800-367-6372. 08V122
I am having issues with a Code P0025 , I replaced both camshaft magnets and both positions sensors on the driver side but I am still getting this code. Can you tell me what problem might be?
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My vehicle has no power, no crank, no sound, no power. I replaced alternator and battery. Still no power need help please.
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You have a blown fuse or bad connection at the battery. There is an inline fuse called a PREFUSE. This is on the red wire that connects from the battery positive tot he alternator. So you can us a multi-meter and check for battery voltage at the alternator. If you do not see battery voltage there then most likely the PREFUSE is blown. Repair or replace as needed.
What will be causing my head light and tail lights to go out. They do not come back on after I have replaced the bulbs. Consequently I think that a fuse has blown in my car. please help
RESPONSE
Possible causes would be a blown fuse as you mentioned, a failed headlight switch or lighting module failure. Furthermore some issue may be involved with the wiring harness. Or wiring connection issues but are not as common as the other reasons.
The headlight switch operates in 7 positions. The 12 o’clock position is off. The 11 o’clock position will turn on the right side parking lights. The 10 o’clock position will turn on the left side parking lights. The 1 o’clock position will turn on all parking lights, marker lights and instrument panel lights. The 2 o’clock position will turn on the headlights and parking lights. To activate front fog lights, pull headlight knob out to first click. To turn on rear fog light ion addition to front fog lights, pull headlight switch knob out 2 clicks. Fog lights will only turn on if the headlights are in the low beam position, or when all parking lights are on.
My car has been acting weird recently. It idles roughly (sometimes violently), consumes loads of fuel and at times accelerates sluggishly. The engine light comes on with Code P0102 (air flow circuit too small) and Code P0172 (Mix bank 1 rich).
What should be me course of action to remedy the problems?
Appreciate your assistance!
Jon
RESPONSE
Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
The Code P0102 is set when an excessively low voltage from the sensor is sent to Engine Control Module (ECM).
The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).
Temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. More air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
2002 Mercedes C230 won’t shift to reverse or park, stuck in neutral and drive.
RESPONSE
My best guess would be a damaged shift cable. Disconnect the cable from the shifter and see if it moves. If not the shifter itself is damaged. If it moves, reconnect the cable to the shifter and disconnect the other end. If it does not move, the cable is damaged. If it does move, internal transmission issue.