2011 Seat Leon 5D fuel additives

216Checking and refilling levels
Petrol additives
Petrol additives improve the quality of the petrol.
The quality of the petrol influences the performance, power and life of the
engine. For this reason, you should use good quality petrol containing addi-
tives. These additives will help to prevent corrosion, keep the fuel system
clean and prevent deposits from building up in the engine.
If good quality petrol with additives is not available or engine problems oc-
cur, the required additives must be added during refuelling. 
Diesel Diesel*
Diesel fuel must conform to DIN EN 590 (EN = “European Standard”). It
must have a cetane number (CN) of at least 51. The cetane number indi-
cates the ignition quality of the diesel fuel.
Notes on refuelling ⇒ page 210. Biodiesel*
CAUTION
● Your vehicle is not designed to use biodiesel fuel. Never, under any cir-
cumstances refuel with biodiesel. The use of biodiesel fuel could damage
the engine and the fuel system. The addition of biodiesel to diesel fuel by
the diesel manufacturer in accordance with standard EN 590 or DIN 51628
is authorised and will not cause damage to the engine or the fuel system.
● The diesel engine has been designed to be used exclusively with diesel
fuel conforming to standard EN 590. Never refuel or use petrol, kerosene,
fuel oil or any other type of fuel. If you accidentally fill up the vehicle with
the wrong type of fuel, do not start the engine. Seek assistance from speci-
alised personnel. The composition of these fuels may severely damage the
fuel system and the engine. 
Winter driving
Diesel can thicken in winter.
Winter-grade diesel
When using “summer-grade diesel fuel”, difficulties may be experienced at
temperatures below 0°C because the fuel thickens due to wax separation.
Therefore, “winter-grade diesel fuel” is available in some countries during
the cold months. It can be used at temperatures as low as -22°C.
In countries with different climatic conditions the diesel fuel generally sold
has different temperature characteristics. Check with an Authorised Service
Centre or filling stations in the country concerned regarding the type of die-
sel fuels available.
Filter pre-heater
Your vehicle is fitted with a fuel filter glow plug system, making it well
equipped for operation in winter. This ensures that the fuel system remains 

217
Checking and refilling levels
operational to approx. -24°C, provided you use winter-grade diesel which is
safe to -15°C.
However, if the fuel has waxed to such an extent that the engine will not
start at temperatures of under -24°C, simply place the vehicle in a warm
place for a while.
CAUTION
Do not mix fuel additives (thinners or similar products) with diesel fuel. 
Working in the engine compartment Safety instructions on working in the engine compartment
Any work carried out in the engine compartment or on the
engine must be carried out cautiously.
Before starting any work on the engine or in the engine compart-
ment:
1. Switch off the engine and remove the key from the ignition.
2. Apply the handbrake.
3. Move the gear lever to neutral or the selector lever to position P.
4. Wait for the engine to cool down.
5. Keep children away from the vehicle.
6. Raise the bonnet ⇒ page 219. You should not do any work in the engine compartment unless you know ex-
actly how to carry out the jobs and have the correct tools! Have the work car-
ried out by a specialised workshop if you are uncertain.
All service fluids and consumables, e.g. coolant, engine oil, spark plugs
and batteries, are under constant development. SEAT provides a constant
flow of information to the Authorised Service Centres concerning modifica-
tions. For this reason, we recommend you to have service fluids and con-
sumables replaced by an Authorised Service Centre. Please observe the rel-
evant instructions
⇒ page 208. The engine compartment of the vehicle is a
hazardous area ⇒ 
.
WARNING
All work on the engine or in the engine compartment, e.g. checking and
refilling fluids, involves the danger of injury and scalding as well as the
risk of accident or fire.
● Never open the bonnet if you see steam, smoke or coolant escaping
from the engine compartment. Otherwise, there is a risk of sustaining
burns. Wait until no more steam or coolant is emitted, then allow the en-
gine to cool before carefully opening the bonnet.
● Switch off the engine and remove the key from the ignition.
● Apply the handbrake and move the gear lever to neutral or selector
lever to position P.
● Keep children away from the vehicle.
● Never touch hot engine parts. There is a risk of burns.
● Never spill liquids on a hot engine or on a hot exhaust gas system.
This is a fire hazard.
● Avoid causing short-circuits in the electrical system, particularly at
the points where the jump leads are attached ⇒ page 264. The battery
could explode. 
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

Oil properties . . . . . . . . . . . . . . . . . . . . . . . . . . 221
One-touch opening and closingElectric windows . . . . . . . . . . . . . . . . . . . . . 111
Opening and locking . . . . . . . . . . . . . . . . . . . . 108
Outside temperature display . . . . . . . . . . . . 65, 73
Overview Control lamps . . . . . . . . . . . . . . . . . . . . . . . . 77
Dash panel . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Indicator lamps . . . . . . . . . . . . . . . . . . . . . . 79
Instruments . . . . . . . . . . . . . . . . . . . . . . . . . 57
Warning lamps . . . . . . . . . . . . . . . . . . . . 77, 79
P Paintwork Polishing . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Parking lights . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Parking system . . . . . . . . . . . . . . . . . . . . . . . . . 175
Parking system plus . . . . . . . . . . . . . . . . . . . . . 176
Passenger see Correct sitting position . . . . . . . 10, 11, 12
Pedals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Petrol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 Driving abroad . . . . . . . . . . . . . . . . . . . . . . 194
Petrol additives . . . . . . . . . . . . . . . . . . . . . . . . 216
Physical principles of a frontal collision . . . . . . 21
Plastic parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Plastic parts cleaning . . . . . . . . . . . . . . . . . . . . 205
Pollen filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Pollution filter . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Power steering . . . . . . . . . . . . . . . . . . . . . . . . . 187 Products for vehicle maintenance . . . . . . . . . . 199
R Radio frequency remote control . . . . . . . . . . . 104 Changing the battery . . . . . . . . . . . . . . . . . 105
Radio navigation steering wheel controls Audio version . . . . . . . . . . . . . . . . . . . . . . . . 95
Audio + telephone version . . . . . . . . . . . . . . 95
Rain sensor* . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Rear fog light Indicator lamp . . . . . . . . . . . . . . . . . . . . . . . 82
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 115
Rear interior lights . . . . . . . . . . . . . . . . . . . . . . 124
Rear reading lights . . . . . . . . . . . . . . . . . . . . . . 124
Rear seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Rear shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Rear window automatic wiper/washer . . . . . . 128
Rear window wiper . . . . . . . . . . . . . . . . . . . . . . 128
Recommended gear display . . . . . . . . . . . . . . . 62
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Registration light . . . . . . . . . . . . . . . . . . . . . . . 262
Remote control key Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Synchronising . . . . . . . . . . . . . . . . . . . . . . . 105
Removing and fitting the wheel . . . . . . . . . . . 247
Repairs Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Replacement keys . . . . . . . . . . . . . . . . . . . . . . 103
Replacement of parts . . . . . . . . . . . . . . . . . . . . 208
Rev counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Reverse gear
Manual gearbox . . . . . . . . . . . . . . . . . . . . . 167
Roll-back function Sliding/tilting sunroof . . . . . . . . . . . . . . . . 114
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Roof aerial* . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Roof rack* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Rubber seals . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Run-flat tyres . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Running in Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
S Safe driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Safety equipment . . . . . . . . . . . . . . . . . . . . . . . . . 7
Safety instructions Coolant temperature . . . . . . . . . . . . . . . . . . 82
Safety notes Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Curtain airbags . . . . . . . . . . . . . . . . . . . . . . . 42
Deactivating front passenger airbag . . . . . . 45
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . 37
Seat belt tensioners . . . . . . . . . . . . . . . . . . . 29
Side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 40
Using child seats . . . . . . . . . . . . . . . . . . . . . 46
Using seat belts . . . . . . . . . . . . . . . . . . . . . . 23
Safety system - Safe . . . . . . . . . . . . . . . . . . . . . . 98
Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Seat adjustment . . . . . . . . . . . . . . . . . . . . 132, 135
Seat belt cleaning . . . . . . . . . . . . . . . . . . . . . . 207
296 Index