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S430

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Question
Airmatic issues with front of car
Hi. The Mercedes-Benz air suspension uses an air compressor and air struts to provide a comfortable ride over any terrain. Unfortunately, the system is known for being problematic. Since just the front of your car is collapsed, the problem is...
Question
Signal light on dashboard out
There are a few possible reasons that will cause this issue. A blown bulb, faulty fuse (continuity check), a dimming rheostat, or a failed connection to the instrument cluster. In order to have the electrical system properly tested, I would...
Question
Air suspension not working
Hi there, with the Airmatic malfunction the car is telling you the tire pressure is low probably causing a flat tire. A nail or small leak would allow you to hear the tire releasing air. A qualified mechanic, like one...
Question
Rear trunk latch not working right
Hi there. The electronic truck latch is operated by an electronic actuator much like the locks on your door. Like many electronic devices, repeated usage wears it out over time. Some actuators can be replaced independently and some require it...
Question
Air suspension not pumping up
Hi, other S430 owners have reported similar issues with their suspension systems. From your description, it appears the pump is in working order, just the one corner is lower than the rest. This could be caused by a leak somewhere...
Question
Airmatic system not rising
Issues with this system are not common. The system has a set of bags that get filled with air to level the car when the sensors determine it is riding low. If the pump fails or the bags themselves develop...
Question
It makes noise when I hit the brake my mechanic thinks it's the transmission
If you cannot locate an authorized independent Mercedes repair facility other than a dealer then I'd recommend going to a dealer for this problem. I would suggest going to a trained Mercedes shop for transmission problems, otherwise you may not...
Question
Dash lights stayed on despite several parts were replaced
Since the steering column was opened, and you not only have faults showing in the ESP, ABS, and BAS systems with the indicator lights, but you also have the SRS light on as well, I am inclined to believe that...
Question
The car cannot start, there is no cranking
It is very possible that the Drive Authorization System is preventing the vehicle from starting. The system needs about 12.6v to operate properly, so battery voltage needs to be checked with the key. If battery voltage is good, then there...
Question
Service A light appeared
The A service is an oil and filter change with the rest of the car checked over for any other problems. The equivalent service YourMechanic offers is the oil and filter change with full synthetic oil and a 50 point...
Question
Ignition central locking disabled
Hi, thanks for writing in. You probably have a valet mode that is switchable in your security system. You want to first check that mode and be sure it is set up the way you want it (on or off)....
Question
Is it expensive to change my crank sensor?
Hello. Most of the time when this occurs on this vehicle it is caused by a failing crankshaft position sensor. These will fail intermittently on this engine and cause these same symptoms. It can also be an issue with the...
Question
GRINDING NOISE WHILE BRAKING
This may be a sign of warped brake rotors. As you may know, when you press on your brake pedal, this activates a hydraulic pressure which forces small pistons inside your brake calipers to push the brake pads against the...

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