5 Glossary
Term Explanation
ABS Anti-locking brake system. The ABS is a regulating system in the brake system, that
prevents locking when braking. This helps to maintain directional stability and steerabil‐
ity.
All-wheel drive
coupling
Term to be used in place of “Haldex” with immediate effect. Legal implications make
this step necessary. The term may nevertheless appear in older documents but need
not be replaced.
TCS Traction control system The TCS prevents the wheels from slipping when the vehicle is
driven off.
ATF Automatic Transmission Fluid. Gear oil for automatic gearbox.
EET Exhaust emissions test
AUS 32 Abbreviation for “Aqueous Urea Solution” with 32.5% urea content, see also (AdBlue®)
⇒ page 67
AdBlue® Is an invented name.
This fluid is also referred to as “NOx reducing agent AUS 32”, “AUS 32” or “Diesel
Exhaust Fluid” (in the US).
AdBlue® is a colourless reducing agent that is used for exhaust post-treatment in order
to reduce nitrous oxides and particulates.
AdBlue® is a registered trademark of the VDA (Verband der Automobilindustrie -
German association of the automotive industry) in the USA, Germany, the European
Union and other countries.
The AdBlue urea solution is not mixed with diesel fuel, but is carried in a separate tank
in the vehicle.
ATF level Filling level of ATF in gearbox
BEV Battery Electric Vehicle. Electric vehicle
CNG Compressed Natural Gas. Compressed natural gas
CO Carbon monoxide. Produced when fuels containing carbon are not combusted com‐
pletely
Common rail
“CR”
This term refers to a common high-pressure injection line, the “rail”, which supplies all
cylinders of the relevant cylinder bank with fuel.
Diesel exhaust
fluid
Designation used in the US for the NOx reducing agent AUS 32, or the AdBlue®.
DIN Deutsches Institut für Normung e.V. (German Standards Authority)
DLA Dynamic Light Assist: a system with variable road illumination allows the vehicle to be
driven permanently with main beam without dazzling oncoming traffic.
DPF Diesel particulate filter
DS Direct shift
DSP Digital service plan
DSG Dual clutch gearbox
ATA Anti-theft alarm
ECE Economic Commission for Europe
eHybrid (plug-in
hybrid)
High-performance plug-in hybrid vehicles made by Volkswagen. Even longer distances
can be covered fully electrically (commuters).
eTSI (mild hybrid) Electrified power units made by Volkswagen. Savings in fuel consumption plus higher
comfort.
ETKA Electronic parts catalogue
Part no. Abbreviation for part number
EN European standard
EOBD European On-Board Diagnosis
ESP Electronic stabilisation program. Prevents potential vehicle skidding by targeted inter‐
vention in the brake and engine management systems.
FAME Fatty acid methyl ester
ID.4 2021 ➤
Maintenance - Edition 12.2020
5. Glossary 67
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