Frequently asked questions

How does AdBlue work?


AdBlue®, a water/urea based additive for diesel engines, is stored in a tank and injected directly into a specially modified part of the vehicle’s exhaust. This, in turn, begins a chemical reaction in order to remove the polluting oxides of nitrogen, converting them into harmless oxygen and nitrogen in a process called ‘Selective Catalytic Reduction (SCR)’. SCR is only available for diesel engines and you will use less AdBlue® the more economically you drive. Depending on the model and size of the vehicle you have, the size of the AdBlue® tank fitted and the rate at which AdBlue® is consumed will vary. Many other factors will also affect how much AdBlue® is used (and, by extension, how often top-ups will be required), these include: mileage, driving style, journey type, and environmental conditions. Generally, a passenger car can consume approximately 1 litre of AdBlue® every 600 miles, but please refer to your operator’s manual, or speak to a member of our staff for more in-depth information.




How will I know when to top AdBlue® up?


When your vehicle is due a top up, a series of warnings will be given via the driver information system. These warnings, and their frequency, will differ depending on your vehicle’s make and model, so please refer to your manual if you have any concerns. However, if these warnings are ignored and the AdBlue® is allowed to deplete, the vehicle will no longer restart once the ignition is turned off; this is a required feature of the system, not a fault. If this happens the vehicle will require a full AdBlue® top-up and a repairer will be required to re-programme the vehicle before it can be restarted. If in doubt, please contact a member of our staff who are happy to help. TCH Leasing will pay for AdBlue® top-ups that are within your scheduled service visits; however, it will be the driver’s responsibility to arrange the top-up outside of these scheduled service visits. AdBlue® can be purchased from most good fuel stations.




What do I need to know about AdBlue?


  • AdBlue® is not a fuel additive. This is why it requires a separate tank
  • If you put AdBlue® in your fuel tank by mistake, do not start the engine. Instead, contact us immediately for help
  • Put only AdBlue® in the AdBlue® tank; do not fill the tank with any other liquids
  • Prevent anything from contaminating AdBlue®
  • If small quantities of AdBlue® come into contact with your skin or the vehicle’s paintwork, wipe it off immediately and rinse the area thoroughly with water




How can I benefit from smart technologies?


With the boom in technological advances, cars now come with a vast array of smart technology options that can make driving easier and more luxurious. With the advent of vehicle connectivity, including increased driver information and features such as Automatic Crash Response, which can send emergency help to your location, even when you are unable to ask for it yourself, driving has become infinitely safer. This is great news for those of you who are required to do a lot of driving as part of your job, but these features must come at a cost. Here at TCH Leasing, many of our vehicles are compatible with these features and technologies that increase driver convenience and safety. Some of these connectivity services come free for the first year to give you an idea of just how impactful this kind of technology can be, and the peace of mind it can offer. However, please be aware that after the first year additional features such as these will require a renewal fee, which will be payable by the customer and not TCH Leasing.




What smart technologies are available?


1. Adaptive Cruise Control This technology is particularly useful on long journeys and motorways. Where drivers otherwise would have to constantly monitor their cruise control systems for safety reasons, adaptive cruise control will automatically slow down or speed up your vehicle in response to the actions of the vehicle ahead of you. Most of these systems automatically shut off below a certain speed threshold, but some can even be used in traffic. 2. Adaptive Light Control These systems are designed to help drivers see further and more clearly in the dark. It allows the headlights to swivel and rotate to better illuminate the roadway around bends and in other situations, such as when approaching a roundabout. 3. Automatic Braking This damage limitation technology is designed to reduce the severity of high speed collisions in the event of driver distraction. While some automatic braking systems can actually prevent a collision, they’re more typically designed to slow the vehicle to the point where less damage is caused and the likelihood of fatalities is minimised. 4. Automatic Parking These systems can vary massively, but most are designed to help a driver parallel park through advice and prompts of when to turn the steering wheel and when to stop. However, some can even perform the entire job automatically. 5. Blind Spot Detection This technology uses a variety of sensors to provide the driver with vital information that would be difficult, or even impossible, to achieve by any other means. Some of these systems will sound an alarm when there is an object in a blind spot, and others include cameras in order to provide the driver with a live image of the unseen object. 6. Collision Avoidance Systems These use a variety of sensors to determine whether a vehicle is in danger of colliding with another object. They can, by design, detect the proximity of other vehicles, pedestrians, animals, and various other obstructions. If the vehicle is in danger of colliding with another object, the system will warn the driver, and some can even take other preventative actions such as pre-charging the brakes or apply tension to the seat belts. 7. Driver Drowsiness Detection Driver drowsiness or awareness detection systems use a number of different methods to determine if a driver’s attention levels are waning. Some of these systems detect when the driver’s head nods in a motion that indicates drowsiness, while others use technology similar to lane detection warning systems. 8. Hill Descent Control This is an ADAS that makes it easier to descend steep inclines by activating the brakes to automatically slow the vehicle. Some of these systems allow the speed to be modified via the cruise control system, and they can typically be overridden by pressing the brake or the accelerator. 9. Intelligent Speed Adaptation This ADAS depends on a variety of information to assist a driver in maintaining a legal speed. Since these systems monitor the current speed and compare it with the local speed limit, they only work in certain areas where they can access the relevant information. 10. Lane Departure Warning Systems These systems use a variety of sensors to make sure that the vehicle doesn’t leave its current lane accidentally. If the system determines that the vehicle is drifting it will sound an alarm to warn the driver so they can take corrective action. Some systems also cause the steering wheel to vibrate as an additional warning. Lane Keeping Systems go a step further than this and are capable of taking small corrective actions without any driver input. 11. Night Vision Night Vision systems allow drivers to see things that would otherwise be difficult for the driver to make out in the dark. There are a number of different useful implementations, all of which are broken down in to categories of ‘active’ or ‘passive’. ‘Active’ night vision systems project infrared light, while ‘passive’ systems rely on the thermal energy emanating from cars, animals, and other objects. 12. Impacts of ADAS With the implementation of some of these amazing technologies comes certain other complications you must consider. For example, when changing the tyres on your vehicle, certain ADAS components, such as adaptive headlights and parking cameras, will require adjusting to account for the new tyre pressure. Similarly, when taking your car abroad to a country that drives on the right-hand side of the road, headlight and blind spot sensor components will need to be recalibrated to account for the shift in road position.




What are the changes to WLTP?


The old lab test, NEDC was first introduced in the 1980s and is not true to real world driving. The WLTP introduces more realistic testing conditions, such as testing cars at higher average and maximum speeds, and testing them for longer distances. This gives a more accurate way of measuring a car’s fuel consumption and emissions. This does mean that official CO2 emissions are likely to be higher under WLTP but there has been no indication as to whether this will affect CO2 bands. If you have an older car, your official CO2 figure will not change, as this never changes after its first registration. During the transition period, there will be both cars that have been approved under WLTP and cars approved using NEDC. This means that where a car has been tested under WLTP, it will have an NEDC equivalent figure calculated for it, which will be used to assess the Vehicle Excise Duty (VED) and Benefit In Kind (BIK). The NEDC or NEDC equivalent figures will be used until April 2020, from which time the new WLTP will be used. A tool called CO2MPAS will be used to calculate the NEDC equivalent rate, and this is an EU approved algorithm.




What do these changes to the WLTP mean to me?


Some data is not currently available and many manufacturers are addressing and handling the changes in different ways. As such, TCH Leasing cannot currently guarantee indicative figures provided at the time of quotation as it is possible that changes may result in increases in first year VED, which will need to be passed on. We will, however, work with both customers and manufacturers to help navigate through this period of transition and will let you know any information on changes to vehicles that have been quoted and ordered when we receive these details. Once the information is provided, the official CO2 figure will only be that provided on the V5 document which is issued upon registration, and TCH Leasing will share that figure with you. If you need any more help or advice regarding the changes, please contact us.





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