Active Parking Assist is an electronic parking assistance system which automatically locates and measures parking spaces on both sides of the vehicle when you are driving forwards up to a speed of approximately 35 km/h.
If all requirements are met, the 
display appears in the multifunction display. The system then independently locates and measures parallel and perpendicular parking spaces on both sides of the vehicle.
When Active Parking Assist has detected parking spaces, the 
display appears in the multifunction display. The arrows show on which side of the road free parking spaces are located.
Active Parking Assist displays parking spaces on the co-driver side as standard. The parking spaces on the driver's side are only displayed if you operate the turn signal on the driver's side. When parking on the driver's side, you must operate the turn signal until you have started active parking assistance by pressing the 
steering-wheel button.
Active Parking Assist can assist you with an active steering intervention and brake application during parking and exiting the parking space. The active brake application is dependent on the country-specific version of the vehicle.
Active Parking Assist is only an aid. It is not a substitute for your attention to the surroundings. You are always responsible for safe manoeuvring, parking and exiting a parking space. Make sure that no persons, animals or objects etc. are in the path of your vehicle.
Parking Assist PARKTRONIC is deactivated.
You steer.
You apply the parking brake.
Parking using Active Parking Assist is no longer possible.
You exceed a speed of 10 km/h.
A wheel spins and ESP® intervenes or fails.
You engage transmission position
. You open a door or the tailgate or unfasten your seat belt.
Objects located above or below the detection range of Active Parking Assist are not detected when the parking space is being measured. They are also not taken into account when the parking manoeuvre is calculated, e.g. overhanging loads, overhangs or loading ramps of lorries, or the boundaries of parking spaces. In some circumstances, Active Parking Assist may therefore guide you into the parking space prematurely.
Active Parking Assist may steer too early.
The vehicle may not stop in front of these objects.
This could cause a collision.
Snowfall or heavy rain may lead to a parking space being measured inaccurately. Parking spaces that are partially occupied by trailer drawbars might not be identified as such or be measured incorrectly. Only use Active Parking Assist on level, high-grip ground.
in extreme weather conditions such as ice, packed snow or in heavy rain
when cornering
for parking spaces which are not on the same level as the road, e.g. not on the pavement
when transporting a load that protrudes beyond the vehicle
when snow chains are fitted
parking spaces where parking is prohibited
parking spaces on unsuitable surfaces
if two parking spaces are located immediately next to each other
if the parking space is immediately next to a low obstacle such as a kerb
if you are parking forwards
if the parking space is on a kerb
if the system deems the parking space to be blocked, such as by foliage or grass paving blocks
if the area is too small for the vehicle to manoeuvre into
if the parking space is bordered by an obstacle, e.g. a tree, a post or a trailer