2010.5 Citroen DS4 trailer

191Driving
With the ignition on or the engine running, to release the parking brake, press on the brake pedal or the accelerator, pull then release control A .
Manual release
Before leaving the vehicle, check that parking brake warning lamp in the instrument panel is on fixed, not flashing.
Manual application
With the vehicle stationary, to apply the parking brake whether the engine is running or off, pullcontrol lever A .
The application of the parking brake is confirmed by:
- illumination of the braking warning lamp and of the P warning lamp in the control lever A ,
- display of the message "Handbrake on".
When the driver’s door is opened with the engine running, a message is displayed accompanied by an audible signal if the parking brake has not been applied.
The full application of the parking brake is confirmed by:
- the braking warning lamp and the P warning lamp in the control lever A going off,
- display of the message "Handbrake off ".
If you pull control lever A without pressing the brake pedal, the parking brake will not be released and a warning lamp will come on in the instrument panel.
Maximum application
If necessary, you can make a maximum application of the parking brake. This is obtained by means of a long pull on the control lever A , until you see the message "Handbrake on maximum" and a beep is heard. Maximum application is essential: - in the case of a vehicle towing a caravan or a trailer, if the automatic functions are activated but you are applying the parking brake manually, - when the gradient you are parked on may vary (e.g. on a ferry, on a lorry, during towing),
In the case of towing, a loaded vehicle or parking on a gradient, make a maximum application of the parking brake then turn the front wheels towards the pavement and engage a gear when you park. After a maximum application, the release time will be longer.

No aler t will be given in the following situations: - in the presence of stationary objects (parked vehicles, barriers, street lamps,
road signs...), - with vehicles moving in the opposite direction, - driving on a sinuous road or a sharp corner,
The aler t is given by a warning lamp which comes on in the door mirror on the side in question as soon as a vehicle - car, lorry, cycle - is detected and the following conditions are fulfilled: - all the vehicles must be moving in the same direction, - the speed of your vehicle is between 6 and 75 mph (10 and 140 km/h), - the difference in speed between your vehicle and the other vehicles must be less than 9 mph (15 km/h), - the traffic must be flowing normally, - in the case of an over taking manoeuvre, if this is prolonged and the vehicle being over taken remains in the blind spot, - you are driving on a straight or lightly cur ved road, - your vehicle is not pulling a trailer, a
caravan...
- when over taking (or being over taken by) a very long vehicle (lorry, coach...) which is at the same time detected at the rear in the
blind spot angle and present in the driver's for ward field of vision, - in very heavy traffic: vehicles detected in front and behind are confused with a lorry or a stationary object, - when over taking quickly.

Operating fault
If an operating fault occurs, when reverse gear is engaged this warning lamp is displayed in the
instrument panel and/or a message appears in the screen, accompanied by an audible signal (shor t beep). Contact a CITROËN dealer or a qualified workshop.
In addition to the rear parking sensors, the front parking sensors are triggered when an obstacle is detected in front and the speed of the vehicle
is still below 6 mph (10 km/h). The sound emitted by the speaker (front or rear) indicates whether the obstacle is in front or behind. The front parking sensors are interrupted if the vehicle stops for more than three seconds in for ward gear, if no fur ther obstacles are detected or when the speed of the vehicle exceeds 6 mph (10 km/h).
The function will be deactivated automatically if a trailer is being towed or a bicycle carrier is fitted (vehicle fitted with a towbar or bicycle carrier recommended by CITROËN).
In bad weather or in winter, ensure that the sensors are not covered with mud, ice or snow. When reverse gear is engaged, an audible signal (long beep) indicates that the sensors may be dir ty. When the vehicle is moving at a speed below 6 mph (10 km/h), cer tain sound sources (motorcycle, lorry, pneumatic drill, etc.) may trigger the audible signals of the parking sensor system.
Deactivation/Activation of the front and rear parking sensors
The function is deactivated by pressing this button. The indicator lamp in the button
comes on. Pressing this button again reactivates the function. The indicator lamp in the button goes off.

259Practical information
Dashboard fuses
The fusebox is placed in the lower dashboard (left-hand side).
Access to the fuses
 Refer to the paragraph "Access to the tools".
Fuse tables
Removable
relay N°RatingFunctions
R1- Not used.
R2- 12 V socket in boot.
Fuse N°RatingFunctions
F320 A Parking lamps, trailer hazard warning lamps
F420 A Interior lighting, trailer inter face.
F530 A Front one-touch electric windows.
F6- Not used.
F1120 A 12 V trailer socket.
F12- Not used.
F1330 A Hi-Fi amplifier.
F2220 A Trailer signalling.

Towing a trailer, a caravan, etc.
Towbar suitable for the attachment of a trailer or caravan with additional lighting and signalling. Your vehicle is primarily designed for transpor ting people and luggage, but it may
also be used for towing a trailer.
We recommend the use of genuine CITROËN towbars and their harnesses that have been tested and approved from the design stage of your vehicle, and that the fitting of the towbar is entrusted to a CITROËN dealer or a qualified workshop. If the trailer is not fitted by a CITROËN dealer, it is imperative that it is fitted using the vehicle's electrical pre-equipment, in accordance with the manufacturer's instructions.
Driving with a trailer places greater demands on the towing vehicle and the driver must take par ticular care.

271Practical information
The rear parking sensors will be deactivated automatically if a genuine
CITROËN towbar is used.
Driving advice
Distribution of loads
 Distribute the load in the trailer so that the heaviest items are as close as possible to the axle and the nose weight approaches the maximum permitted without exceeding it. Air density decreases with altitude, thus reducing engine per formance. Above 1 000 metres, the maximum towed load must be reduced by 10 % for every 1 000 metres of altitude. Refer to the "Technical Data" section for details of the weights and towed loads which apply to your vehicle.
Side wind
 Take into account the increased sensitivity to side wind.
Cooling
Towing a trailer on a slope increases the temperature of the coolant. As the fan is electrically controlled, its cooling capacity is not dependent on the engine speed.  To lower the engine speed, reduce your speed. The maximum towed load on a long incline depends on the gradient and the ambient temperature. In all cases, keep a check on the coolant temperature.
Braking
Towing a trailer increases the braking distance.
Tyres
 Check the tyre pressures of the towing vehicle and of the trailer, obser ving the recommended pressures.
Lighting
 Check the electrical lighting and signalling on the trailer.
 If the warning lamp and the STOP warning lamp come on, stop the vehicle and switch off
the engine as soon as possible.

277Technical data
WEIGHTS AND TOWED LOADS (in kg)
Petrol enginesVTi 120THP 155THP 200
GearboxesManualManualManual
Model codes: NX...5FS05FV8/P5FU8
- Unladen weight 1 205 1 284 1 316
- Kerb weight 1 280 1 359 1 391
- Gross vehicle weight (GV W) 1 755 1 795 1 820
- Gross train weight (GTW) on a 12 % gradient 2 955 3 195 2 820
- Braked trailer (within the GTW limit) on a 12 % gradient 1 200 1 400 1 000
- Braked trailer * (with load transfer within the GTW limit) 1 450 1 650 1 250
- Unbraked trailer 640 680 695
- Recommended nose weight 75 75 75
* The weight of the braked trailer can be increased, within the GTW limit, if the GV W of the towin g vehicle is reduced by an equal amount. Warning: towing using a lightly loaded towing vehicle may have an adverse effect on its road holding.
The GTW and towed load values indicated are valid u p to a maximum altitude of 1 000 metres; the towed load mentioned must be reduced by 10 % for each additional 1 000 metres of altitude. The speed of a towing vehicle must not exceed 60 m ph (100 km/h) (comply with the legislation in force in your country). High ambient temperatures may result in a reduction in the per formance of the vehicle to protect the engine; if the ambient temperature is above 37 °C, limit the towed load.

279Technical data
WEIGHTS AND TOWED LOADS (in kg)
Diesel enginesHDi 110 PEFHDi 163 PEF
GearboxManualElectronic gearbox systemManual
Model codes: NX...9HR89HR8/PSRHH8
- Unladen weight 1 290 1 300 1 320
- Kerb weight 1 365 1 375 1 395
- Gross vehicle weight (GV W) 1 805 1 815 1 880
- Gross train weight (GTW) on a 12 % gradient 3 105 3 115 3 180
- Braked trailer (within GTW limit) on 12 % gradient 1 300 1 300 1 300
- Braked trailer * (with load transfer with the GTW limit) 1 550 1 550 1 550
- Unbraked trailer 680 680 695
- Recommended nose weight 75 75 75
* The weight of the braked trailer can be increased, within the GTW limit, if the GV W of the towin g vehicle is reduced by an equal amount. Warning: towing using a lightly loaded towing vehicl e may have an adverse effect on its road holding.
The GTW and towed load values indicated are valid u p to a maximum altitude of 1 000 metres; the towed load mentioned must be reduced by 10 % for each additional 1 000 metres of altitude. The speed of a towing vehicle must not exceed 60 m ph (100 km/h) (comply with the legislation in force in your country). High ambient temperatures may result in a reduction in the per formance of the vehicle to protect the engine; if the ambient temperature is above 37 °C,
limit the towed load.