MDM Mode
This is the MDM Mode Indicator (M Dynamic Mode) text symbol. Quite simply, it refers to a drive mode available in one model, the M, from one Manufacturer, BMW. M Dynamic Mode makes it possible to “drive on a dry roadway with high longitudinal and transverse acceleration but with limited driving stability”. This is automotive tech speak for transferring near full control to the driver.
- Before continuing, is this truly your symbol?? If yes, then read on below.
- Otherwise, you can return to our main Text Symbols page and scan again!
M Dynamic Mode is activated by pressing the stability control off button. This results in the illumination of both the MDM and the stability control OFF symbols. The use of MDM actually shuts off the stability control system. According to BMW, stability control will only be activated when the absolute limit of stability is reached. This is pretty much impossible to define.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
This symbol is a Brake Trouble Indicator symbol. They could indicate a serious problem with the brakes. However, the light will also be on when the hand, or emergency, brake is engaged.
This symbol is a Parking Brake Indicator. There are a number of considerations. The symbol to the right simply indicates that the parking, or emergency brake is engaged. Be sure to disengage the parking or emergency brake before driving.
One of the first idiot lights, this warning light features an old-school oil can. It is the Oil Level or Oil Pressure warning lights or symbol. A wavy line below the oil can indicates the oil level is low. Without the wavy line, your engine is telling you that the oil pressure is low.
There are several versions of the dreaded Check Engine Light, and this one is the most common. It is one of the oldest of the symbols that you may see. The word “Check” may appear inside the image, or below, or not at all.
One of the original idiot lights, at least in red, this is the Temperature Warning light or symbol. In red, it indicates quite simply that the engine temperature is too high. If you see this light, your vehicle should be stopped and the engine turned off as quickly as possible. Turning on the heater to the highest setting will remove some of the heat as well. Contact your dealer or authorized service center as soon as possible.
This is the Master Warning Light symbol, in red. If this light is on, there will likely be text displayed as well on the instrument panel, or another warning light. Look for text in particular. It could very well point out something as serious as low oil pressure. However, despite the serious look to the symbol, it is generally associated with simple reminders such as a door ajar or that it is time to change the oil.
This is the Tire Pressure Monitoring System (TPMS) or Tire Pressure Monitor (TPM) warning light symbol. It is also used as Flat Tire Monitor (FTM), which seems redundant. The tell-tale comes on when the inflation on one of the tires is reduced about 25% or more. In most cases, that will be about eight pounds. This is easily the most misunderstood symbol you will ever see on your instrument panel.
The image of a car with squiggly or wavy lines behind it is the Slip Indicator symbol. When a vehicle detects slippery conditions, its stability or traction control system is activated. The light will flash, irregularly in some vehicles, indicating that the system is doing its work, helping to keep the vehicle in control.
This is a Reduced Engine Power Indicator. Only a handful of manufacturers use this light, which comes on automatically with a reduction in the vehicle’s performance. Given what is likely an obvious reduction in power and acceleration, the symbol itself becomes redundant. The image is the same one used for the Check Engine Light above, with the added arrow pointing down.
This combined system warning indicator covers the Electronic Stability Program (ESP) and the Brake Assist System (BAS). These systems work together, and a fault in either, or both, will cause the light to come on. If it remains on, see your dealer or authorized service center.
This is the primary Key Fob Indicator. A number of picture symbols are used to indicate the presence of an electronic key in a push button or, ironically, keyless start, or keyless ignition, vehicle. These systems will allow a vehicle to be started only when an electronic key is present in, and detected by, the vehicle.
This is an Intelligent Brake Assist (IBA) Off Indicator symbol. IBA uses lasers to identify approaching obstacles and applies the brakes accordingly. The light comes on when the IBA switch is turned off. If the light comes on while the system is on, it is either unavailable temporarily or is malfunctioning. Check that the laser sensor is clean, when it is safe to do so.
Cruise Control Indicator light in text form. This light is illuminated when the cruise control is engaged. It is perfectly straightforward, as opposed to the two image symbols below that are now often used in its place.
This is the most common Check Gas Cap Indicator symbol. It is one of the few things the average driver can do anything about. The image, which is really half of a car with an unscrewed gas cap, can look like a water pitcher with a screw or bolt next to it.
These are Park Assist Indicator symbols. The green version will be visible when the system is activated and working. The manufacturer may refer to this as Intuitive Parking Assistance, Park Distance Control (PDC), etc. It looks like a sail with lines radiating from it!
This is a Low Windshield Washer Fluid Indicator symbol. Fill the windshield washer fluid reservoir as soon as possible. The image actually resembles an open hand-held fan, which is supposed to be the windshield. The dashed lines represent two steams of water.
The acronyms AFS and AFLS in these symbols or indicators stand for Adaptive Front-lighting System or Adaptive Front Lighting System. The difference is very subtle and is the result of a manufacturer choice only.
This symbol is a Tail Light Indicator symbols. The replacement of a light bulb or two will restore order. Some manufacturers add a text message in the instrument panel noting exactly which light is out. The symbol is often described as eyelashes coming out of the back of a car!
This symbol is the High Beam On indicator. The light is active only when the high beams are active (turned on) and has been a standard in vehicles for decades. It is one of only a select few presented in a blue color.
This the Fog Lamp Indicator symbol. The indicator in green is active only when the fog lamps are activated. The wavy or squiggly line crossing straight ones is meant to indicate light passing through the fog.
These are Headlamp Out Indicator symbols. One or more of the headlamp bulbs is burned out or malfunctioning. This is another symbol that may utilize an exclamation point, which always indicates a problem, even if its in the green color. Another symbol in yellow/amber only is an alternative Lamp Out indicator.
This is an Electronic Brake Force Distribution (
These two combinations of warning lights used by manufacturers also warn of a fault in the system. The first is already a combination of what is more typically seen as three separate brake system warnings, and the second indicates a fault with the 
With the system on, as soon as one of the wheels starts to spin, the brakes want to slow that wheel down and the symbol to the left will be seen on the instrument panel. In some cars, even the engine power will be reduced, all of which conspires to leave you stuck. So there you are trying to gain some momentum, and bang, down you go. And I didn’t think of it…
Despite the alphabet soup, they all do the same thing, and are an important safety tool while on the road. A warning light, like the one to the right, will be illuminated to remind you to turn it back on when you are safely underway.
Advanced stability control and traction control systems are the primary culprits, or more to the point, the electronics that they depend on. And they are the least likely to actually fail. These systems rely on signals from the electronics controlling the operation of the engine, transmission, 
Multiple lights rarely, if ever, mean multiple system faults. A fault in the engine (
In a simpler day, if your engine’s oil pressure dropped too low, your dashboard, or more properly, your instrument panel, would have had an analog oil pressure gauge displaying the pressure reading and a warning light, a red dot, that would come on to get your attention. Then some manufacturers did away with the gauge altogether, leaving only the red dot or “Idiot” light. There would have been a temperature gauge plus a light to warn a driver if the engine’s temperature rose too high. But now you might not see a gauge at all. In the meantime, “Idiot” lights have proliferated to the point of madness. And as a driver, you need to be a “road scholar” (sorry) to understand them all.
However, in today’s vehicles, there could never be a corresponding gauge to compliment a Check Engine light, or the ABS (anti-lock brake) light, or a Drivetrain Trouble light, or for any of the dozens of text and picture tell-tales that have permeated vehicle instrument panels over the last few decades.
A Plea to NHTSA to Simplify Nomenclature
Simplify, Simplify, Simplify!
On February 14, 2018, National Highway Traffic Safety Administration Deputy Administrator Heidi King testified before the House Subcommittee on Digital Commerce and Consumer Protection Committee on Energy and Commerce. Among the topics was NHTSA’s goal of safe testing and deployment of Automated Driving Systems, and in the question and answer session noted that a simplification of the language used in describing the systems to the public would be a part of this goal.
Ms. King sees potential danger in the use or misuse of automated systems and she is absolutely right. Before we can all let go of the steering wheel or rely on a car to stop on its own when necessary there has to be absolute clarity that vehicle’s systems are actually capable.
Here, we have advocated for simplification from the start as it relates to advanced systems being introduced today. And to be clear, these same systems are the stepping stones to automation. And the buying public is already confused.
Why Drivers Are Confused
On our website, we host well over 400 warning lights and tell tales mostly from vehicles sold in North America. They include symbols for 16 different Stability Control Systems. Actually, its mostly the names that are different. Wikipedia adds another four in their worldwide list. These lists including two that are named for the actual manufacturer, as if this somehow adds weight. We also host four different names for Active Cruise Control, five more for Collision Warning Systems, three for Blind Spot Monitoring, and so on.
To be sure, there can be and sometimes are good reasons for using distinct names for a given, system, since there may be variations in operation and system integration from one manufacturer to another. However, there are also indications that naming is done simply to stand out. One manufacturer calls its blind spot monitoring a BLind spot Information System so that the acronym can be BLIS!
SO NHTSA and Ms. King if you are listening, for the sake of the driving or riding public please do continue to work to simplify the nomenclature. And please, if you can extend the concept to the current crop of cars and trucks, the driving public will appreciate the effort. After all, stability control is stability control, lane departure systems are lane departure systems, etc. The average driver will never be aware of details beyond this, nor will they need them if they all perform to the same standards.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.