Quiz: how well do you know your Citroen C5 Aircross?

17 questions. After each answer you get a short explanation and a link to the manual page that covers it in detail.

What is the washer fluid reservoir capacity on a C5 fitted with headlight washers?
6.5 litres. With headlight washers the reservoir holds 6.5 litres; without them it is 4 litres. One pump motor serves both front and rear washers, depending on its direction of rotation. Washer

How does the C5's EVA 2 emergency brake assist change the brake booster ratio in an emergency stop?
From 6.6 to 23. The booster ratio rises from 6.6 in normal braking to 23 in emergency braking. It switches when the pedal is pressed faster than 580.8 mm/s, via a mechanical double-piston system. Brakes

At what distance does the parking sensor beep become continuous on the C5?
Under 25 cm. The tone turns continuous below 25 cm, both for lateral and central detection. The beep rate rises as you approach an obstacle, and the rear buzzer volume can be adjusted with the diagnostic tool. Description of audible signal

How many predefined stop positions does the C5 Tourer panoramic roof's electric sunblind have?
11. The blind stops at the nearest of 11 preset positions when you release the control. A first detent moves it step by step, a second detent opens or closes it fully. Panoramic glass roof (Tourer)

In wiper position 1 or 2, below what speed does the C5 automatically slow the wiping rate?
Below 5 km/h. Below 5 km/h the wipe frequency drops, and it returns to the original rate once speed exceeds 10 km/h. Also, never run wipers on a dry windscreen. Wiper control

What must you NOT apply to the windscreen when changing C5 front wiper blades?
Water-repellent products like Rain X. Clean the screen with washer fluid, but no water-repellent products such as Rain X. Also never let a lifted arm drop, as it could damage the windscreen. Special position of the front wipers

After how long with the indicator on does the C5 sound a louder warning above 80 km/h?
20 seconds. Leaving the indicators on for over 20 seconds above 80 km/h raises the buzzer volume. A light tap on the stalk, without passing the resistance point, gives three flashes. Indicators (turn signals)

Where is the camera of the C5's automatic high-beam system located?
At the top of the windscreen. The camera sits at the top of the windscreen, so keep that area clean and demisted. Snow piled on the bonnet or roof can also hide it. Automatic lighting systems - General recommendations

With an automatic C5, what gear selector position blocks the wheels before changing a wheel?
P. Select P, apply the parking brake (unless in automatic mode), switch off, and check the parking brake lights are steady. Make sure occupants are out and safe. Spare wheel

If the C5 tailgate lock fails or the battery is disconnected, where do you insert a rod to open it manually?
Bottom left of the lock, from the boot. From inside the boot, push a rod into the hole at the bottom left of the lock. The tailgate normally has electric locking. Mirrors

On the C5's RD2 and RT2 radios, what two things set the sound volume?
Volume step (0–30) and vehicle speed. The volume step runs from 0 to 30 and the radio corrects automatically for speed internally. Manual adjustment always remains possible. Volume speed compensation (RD2 AND RT2 ONLY)

The C5's RB2, RD2 and RT2 radios are code-protected using which number?
The last 8 digits of the VIN. The code is the last 8 digits of the VIN. At ignition accessory, the BSI checks pairing with the radio, and if it fails the radio goes into scrambled mode. Radio equipment

If the C5 automatic gearbox loses CAN communication, how does the engine cooling fan run?
At low speed. Loss of communication makes the fan unit run at low speed. Normally the oil temperature sensor lets the gearbox computer force the fan on to cool the oil via the heat exchanger. Effect of automatic gearbox

What does the 'Key lock' feature of the C5's 4HP20 automatic gearbox require?
Selecting P before removing the key. Key lock requires the lever in P before the ignition key can be removed. The 4HP20 also has shift lock, which blocks the lever in P, and 32 shift laws instead of 10. Operating principle

What happens on the C5's Hydractive 3 if the selected ride height is outside the allowed speed range?
It is refused and not memorised. The selection is refused and not stored; the LED for the refused height flashes for 5 seconds on level 1 clusters. Height changes need the engine running. Operating principle

What type of rear brake discs does the C5 have?
Non-ventilated. Rear discs are non-ventilated, while front discs are ventilated. The braking system also has EVA 2 emergency assist and ABS. Presentation of the new C5 vehicle

If the VAN network fails on the C5, which mirror adjustment still works?
Driver mirror adjustment. With a VAN failure, only the driver's mirror can be adjusted; the passenger mirror and reverse indexing don't work. Mirrors being folded finish folding, then deploy. After-sales service

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