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Hi - I suspect the cooling fan has seized or shorted. This is creating enough load to blow the fuse. Disconnect the cooling fan, replace the fuse, and retry starting the engine. Since the engine is starting the first time...

If you are having an electrical system problem that is causing the lighting and other systems to have erratic issues then you need to check the alternator wire connections on the back of the alternator for loose or bad connections....

The diesel treatment should not hurt anything in this car. Have the fuel tank filled with regular gas as soon as possible to dilute the treatment as much as you can. Run it down to 1/2 tank driving normally and...

There are many parts of your Mercedes that could be causing it to lose power and refuse to start. Unfortunately, without more information, it is difficult to provide an exact diagnosis to your C240’s issue. Provided the engine did not...

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Hi there. Check to see what the oil pressure is in the engine. If the oil pressure is low, then the P0299 code can appear. Also, check for the EGR operation and see if its sticking. A faulty EGR will...

Older vehicles used to have replaceable lenses (just screwed on) but most vehicles made in recent decades have the lens integral with a housing or larger assembly. Depending on the vehicle, the cost of the assembly is often manageable particularly...

Hello - the rhythmic knocking you hear could be something driven by the serpentine belt (i.e. AC compressor) or the belt itself. It is also possible that this an internal noise - like the timing chain, which is immediately behind...

Hello - the lack of fan functionality in the front only of your van could be caused by either the front fan, the fan control switch or the front fan motor resistor pack failing. If the front fan works in...

This may suggest a faulty starter solenoid. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. When this fails, it may cause a clicking sound and will not allow the...

A tight feeling when shaking the tire vertically does not always completely rule out the wheel bearing. A technician with a stethoscope or electronic hearing device can listen to the wheel as it is rolling and compare the type of...

Hi there: The symptoms you've described are often associated with motor mounts that are damaged and need to be replaced. An engine mount, made of rubber and steel, has two purposes. Motor mounts provide two specific functions. One, it secures...

The quality of the fuel in the vehicle may possible trigger an O2 sensor to produce false readings, although this is very rare and not normal. As you may know the [oxygen sensors]((https://www.yourmechanic.com/services/oxygen-sensor-replacement) which are part of your emissions system...

This is a common issue. There are several components that can fail to prevent the shifting out of park. The interlock system has two things that often fail, the switch itself and the electronic interlocking mechanism itself. If the switch...

Depending on your exact model, your vehicle is equipped with either two or three child restraint tether anchors. Many child restraint systems rely on tethers. The anchors in your car are on the back wall of the cabin. Attach the...

The check engine light means the ECM has stored a code in memory. The code may be indicating the problem causing the problem you are having. The problem sounds like you are having an issue with the fuel control, such...

Performing an engine teardown and rebuild is a high magnitude job. Even for a skilled mechanic, there are often little problems just like the one you are experiencing that usually occur afterward. This is especially true if it is your...

Hi there. Typically when your transmission grinds only in that particular gear, it is because the second gear's synchronizer is failing. That would mean that the transmission would need to be taken apart and rebuilt. Prior to doing this, I...

Remove the belt and check for noise. If the noise is gone, rotate the components that are associated with the belt. Check for smooth operation and noise. Noise that persists with the belt off could originate from inside the engine....

The first thing to check would be the engine oil level. The red oil can light is a warning light for low oil pressure and this can happen if there is an internal failure or if the oil level is...

A no-start or start-then-stalls issue can be caused by a couple of different things. A bad smart key can be one of them. Use the second smart key provided with the vehicle to try starting the vehicle. If it starts,...

Hi there. Sounds as if the transmission is low on fluid or the transmission is worn and has roller bearings that are damaged. Check the transmission oil level and see if the fluid is low. The fluid should slightly run...