Author: Automotive expert specializing in Chinese vehicles, with hands-on experience in diagnostics, maintenance, and real-world operation of ICE, hybrid, and electric models.
avtomir.site Editorial Team · Updated: October 1, 2026
Haval and Tank vehicles often have more settings than a first drive suggests. Some functions sit in the regular menus but are buried deep. Others are service modes or part of the infotainment engineering menu, and some depend on trim level and market, so they are not present on every car. Tank models are sold under the GWM name in several markets, including Australia.
Important
Available functions, menu names and access methods vary by model, model year, software version, market and trim. Procedures drawn from owner reports below are experience, not a guarantee: always confirm against the owner’s manual for your exact vehicle.
Differential locks, Tank Turn Assist, Crawl Control, transparent chassis view
Depends on the vehicle
1. Wiper service position
This is the most practical “hidden” feature. It parks the wipers upright so you can replace blades, clean the base of the windscreen or free blades from frost. Retailer guides for Haval describe the same basic routine: ignition off, then hold the right-hand wiper stalk for about 3 to 5 seconds[2], [3]. The H6 manual words it as setting the power mode to LOCK and pulling the stalk upward for about 3 seconds[1], so the pull direction is described differently across sources. Check the manual for your model.
Model
Reported method
Sources
Haval H6 and other models with the wiper stalk on the right
Power off (LOCK), pull and hold the wiper stalk for about 3 to 5 seconds until the arms rise
To return the blades to rest, switch the vehicle on and operate the wiper stalk[3]. Two cautions from the sources: make sure the blades are not frozen to the glass before you activate service mode[2], and do not open the bonnet while the arms are raised[1]. Avoid moving the vehicle with the arms lifted[2].
2. The infotainment engineering menu
Many Haval and Tank head units have a separate engineering or service menu intended mainly for diagnostics and setup of the infotainment system. How you reach it depends on the software. Owners of some models describe tapping the software version in the system information screen[6], while for the Tank 500 and Haval H9 one source distinguishes a short menu from a full one that needs service activation[8]. There is no universal code, so this article does not list codes or button sequences: they will not work across firmware versions.
Model
What owners report seeing
Sources
Haval F7
Version information, tuner, Wi-Fi management, Bluetooth test, screen and touch tests, GPS information
Some owners unlock the menu to install third-party apps. That goes beyond intended use, and it is worth asking a dealer about the consequences, including warranty, before you try it.
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On vehicles with a telematics unit (T-Box), the engineering menu can sometimes help you see connection status when the companion app cannot find the car. A missing connection does not necessarily mean a faulty unit: registration, service availability and market differences are all possible causes.
Not a scanner replacement
The head-unit menu does not replace diagnosing individual control units. If an engine, transmission, ABS or safety-system warning is showing, a clean multimedia screen proves nothing: those units must be read with a scanner.
4. Driver-assist settings and why they differ by market
A lot of what gets called “hidden” is in the ordinary vehicle settings menu: lane keeping, collision warning, adaptive cruise, blind-spot monitoring, parking aids, lighting, mirrors and door-lock behavior, depending on trim. What you can adjust varies. A Pakistani H6 owner reports that extra customization seen on some overseas firmware was missing from his November 2024 build[5], and a review in New Zealand notes that GWM’s Australia and New Zealand arm recalibrated overly intrusive assists after local complaints[9].
Driver assistance is not an autopilot. Even if the car steers or holds a gap, the driver remains responsible.
5. Cameras and the transparent chassis view
On better-equipped versions, many features rely on the surround-view cameras. The Tank 300 is described with a transparent chassis function, built on the surround-view system, that shows the ground beneath the vehicle[9], [10]. In Malaysian off-road testing it appeared on the 12.3-inch screen and helped with precise tyre placement over a log crossing[15]. It is a camera-based aid, not literal X-ray vision, and it matters mostly off-road.
6. Tank off-road functions
Tank Turn Assist. Reviewers describe it as effectively locking the inside rear wheel to tighten the turning circle[9]. In Malaysian testing it worked on loose gravel, and the manufacturer said it is not meant for tarmac[15].
Crawl Control. Essentially off-road cruise control: the vehicle manages power and braking to hold a slow, steady speed so the driver can concentrate on steering[15].
Differential locks and low range. Locks are operated by dash switches, and the low-range transfer case is selected with a dial[11], [12], [18].
Not confirmed in the sources used; check your vehicle
A newer 3.0-litre diesel Tank 500 is reported to offer front, centre and rear locks[12]. Equipment shown here reflects Australian-market road tests, so confirm trims and features for your own market.
Do not assume features carry over
A button or mode on one Tank does not mean the same feature exists on another model or trim. Check the manual for your version before use.
7. Service reminders and sound settings
Equalizer and balance live in the normal audio settings, and unfamiliar advanced audio parameters are best left alone. Resetting the service reminder works differently on each model and should be done only after the maintenance has actually been carried out, not just to clear a message.
Why you should not change engineering-menu parameters casually
Having an option does not mean you should change it. Take particular care with vehicle or function configuration, driver assist, audio tuning, CAN, calibration, camera, sensor and production-mode sections. A wrong value can disable a function, trigger faults, force reconfiguration or cause problems after a software update. Use the menu mainly to view information.
How to check functions safely
Pin down the exact model and year. Not just “Haval”, but for example “Haval Jolion 2024”.
Check the infotainment software version. The same model name does not guarantee the same firmware.
Photograph the original values before changing anything.
Change one parameter at a time so you can trace any problem.
Check the vehicle afterwards: starting, cameras, infotainment, sound, Bluetooth, climate control, driver assist, instrument cluster and warning lights.
The functions most owners will actually use
Function
What it is for
Risk in use
Wiper service position
Blade replacement, windscreen cleaning
Low
Driver-assist settings
Tuning how much help you get
Low
Surround-view cameras
Parking and spatial awareness
Low
Transparent chassis view (Tank)
Seeing obstacles under the vehicle off-road
Low
Tank Turn Assist
Tighter turns on loose surfaces
Medium: follow the manual
Crawl Control (Tank)
Slow, steady off-road progress
Medium
Engineering menu
Viewing infotainment information
Viewing is low risk; changes are not
Frequently asked questions
There is no universal method. Entry depends on the model and head-unit firmware: owners describe, for example, tapping the software version in the system information screen on some models, while on others a short menu and a full menu exist, with the full one needing service activation. Do not type codes or button sequences from forums into a different model or firmware version.
Retailer guides for Haval describe switching the ignition off and holding the right-hand wiper stalk for roughly 3 to 5 seconds, and the H6 manual describes pulling the stalk upward for about 3 seconds with the power mode in LOCK. Some newer models with the wiper controls on the left stalk use a different method. Check the manual for your exact model and market.
Looking at information is generally low risk, but changing configuration, calibration, camera or driver-assist parameters can cause faults or remove functions. Photograph the original values first and change only one parameter at a time.
No. The head unit shows multimedia-system data and some service information, but it does not read the engine, transmission, ABS or safety-system control units.
No. Road tests describe Tank Turn Assist and Crawl Control on both the Tank 300 and Tank 500, and the transparent chassis view on the Tank 300 through its surround-view camera. Equipment depends on trim and market, so confirm on your own vehicle and in its manual.
The bottom line
“Hidden function” is a loose term for Haval and Tank. Some features simply sit deeper in the menus, some are service modes, and some exist only on certain trims, markets or software versions. For most Haval owners the useful basics are the wiper service position, driver-assist settings, the cameras and the correct servicing routine. For Tank owners the off-road aids are the highlight, where fitted. The owner’s manual for your exact vehicle remains the best place to confirm any function.
Sources
These are the materials the article draws on. Owner reports and forum posts reflect individual experience on specific versions and are not official instructions. Sources in Russian are marked (Russian-language). Equipment details for Tank models come mainly from Australian, New Zealand and Malaysian tests.
