Q: What does it mean when a 1999 Mercedes-Benz shuts off when the headlights are turned on?

From the description provided, it appears that your Saturn is experiencing a common issue that can be, in most cases, easily resolved. One trick you can try in the meantime, is to turn the key to the on position and...

The vehicle may have had a problem with a computer sensor like the crankshaft sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-crankshaft-position-sensor) or camshaft sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-camshaft-position-sensor) but normally they would have put a code into the computer. This is not a common problem and would need...

I would recommend having your wheel balance checked. Often times vibrations, such as those you are experiencing on your Lincoln MKZ, can occur while driving if the wheel balance of any of the wheels is out of specification by more...

There are a few components that could be causing your problem. You may want to start by doing some voltage testing on the battery (https://www.yourmechanic.com/services/battery-replacement) and the alternator (https://www.yourmechanic.com/services/alternator-replacement). If you know your alternator and battery are good, look at...

Hi, thanks for writing in. Believe it or not, this happens quite a bit when people swap OEM air filters to K&N or other products. It has nothing to do with the aftermarket part however. The P-0104 OBD-II error code...

Hello. Most of the time this is caused by a wheel speed (https://www.yourmechanic.com/services/wheel-speed-sensor-replacement) or a yaw sensor (https://www.yourmechanic.com/services/yaw-rate-sensor-replacement) issue. I would start by checking the tires. Make sure that they are all the same. If one of the tires is...

Hello - oil consumption (https://www.yourmechanic.com/question/excessive-oil-consumption-and-sooty-exhaust) is, for some reason, higher on this specific engine than on other 4 cylinder engines, turbocharged or not. Typical oil consumption is approximately 1 quart per 1500 miles. If you have blue exhaust smoke on...

If the engine cranks at adequate RPM, be sure there is adequate fuel in the fuel tank and that the fuel is not old. Download any OBD-II trouble codes that have been stored and examine those codes for diagnostic clues....

Hi there. It is quite possible that the electrical harness to the thermostat is faulty or you have an obstruction of coolant inside the radiator or cooling system that is causing an actual temperature flux as you are describing. It...