Mercedes is one of the most renowned automobile companies. The reason for its success, you ask? It has sophisticated features! Mercedes has always provided its owners with exceptional features perfectly suited for that business-like class. One of the model lines that is famous for providing these features is the Mercedes Benz line, including the Mercedes C300, GLC 300, and Mercedes S class.
One of many such features is the dashboard warning saying “Stop Vehicle Leave engine running”. Many Mercedes Benz owners have shown concerns regarding this dashboard warning sign. So let me tell you what this message means, the reasons behind it, and how to solve this.
What Does Stop Vehicle Leave Engine Running Mean?
This warning message aims to tell the car owner about the low battery voltage. This message appears when the voltage falls below 12.5 volts.
The message can appear when you start the car or randomly while driving, but the timing of this message gives an important clue towards the problematic part.
If the message appears only when you start the car, then it’s very likely that your Mercedes w205 battery is old or there is a power drain. On the other hand, if the message appears while you drive, then it’s a clue towards a faulty charging system, the alternator, or a voltage regulator.
Common Causes Of Stop Vehicle Leave Engine Running Message
7 Ways to Fix Stop Vehicle, Leave Engine Running Issue:
The solution to this error depends on the cause. The main question you need to look into is how long the message has been displayed. If it’s been there for an extended period, then the only solution might be to change your Mercedes battery.
To give you a clearer idea of the solutions, let’s look into each cause and its solution individually.
1. Old Battery
A dying battery is the most common cause, It is recommended that you change your car’s battery every 4 to 5 years. But if you want to make sure that the battery being old is the actual reason, then the best option for you is to take your car to a mechanic to get the battery charge level checked.
2. Faulty Auxiliary Battery
A faulty auxiliary battery causes many of the Mercedes Benz functions to stop. These systems may include the GPS system, driver assist systems, etc.
Since an auxiliary battery has a slightly longer life, it is recommended to get it changed after 5 to 6 years. If that’s how long you have been using the auxiliary battery, then it’s probably the issue here.
3. Leaving The Lights On
There have been many times in which the car owner has mistakenly left the radio or lights on overnight. This causes the car battery to be drained and the battery warning appears.
Note: Are you facing issues with your Mercedes radio display? Check out why Mercedes radio display is not working.
The solution in this case is to do exactly what the car says. Put your car in parking mode and let the engine run for almost 10 minutes. Wait for the warning light to turn off and then you are ready to get back on the road.
4. Battery Drain
A battery drain refers to the fact that your car uses power even when the engine is turned off. The reason behind this issue is a faulty electric connection.
In this case, you need to make sure that you always turn off all the auxiliaries. To get this issue solved, you will need to consult a mechanic. The repair cost may vary between $50 to $100 according to your car model and depends on the issue.
5. Excessive Accessories Use
Excessive use of accessories can also cause your car’s battery to drain earlier than usual.
To prevent this issue from occurring, try to minimize the use of accessories and do not use a lot of accessories at the same time. If the error occurs, then turn off all the accessories and do as the warning says.
6. Faulty Alternator
An alternator is the primary part that supplies power to the car’s electrical system. If there is an issue with the alternator, then the car will stop charging the battery, and the “stop vehicle, leave the engine running” message will appear again and again.
It’s best for you to get the entire electrical system of your car checked by an expert technician before you jump to conclusions and spend a large amount of money. The replacement of a faulty alternator may cost you around $250 to $500, depending on the make and model of your car.
7. Problematic Voltage Regulator
A voltage regulator is one of the main components of the alternator. A voltage regulator makes sure that steady voltage and charge are supplied to your Mercedes Benz’s battery and electrical system. If this issue occurs, your car will lose the ability to charge the battery sufficiently.
This issue will also require you to take your car to a mechanic, which may cost you around $200, including the new voltage regulator and labor charges.
A “Stop Vehicle, Shift to P, Leave engine running” message indicates that there is an issue with your car’s battery charge or the electrical system. The best thing is to get the issue solved as soon as possible because driving too long with this message running across your Mercedes Benz dashboard can lead to battery failure.
I hope the next time you find this message running across your Mercedes, this guide will help you to get back on the road.