Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Park Distance Control: Introduction
Park Distance Control (PDC) is an item of special equipment (option 508). Park Distance Control (i.e.: parking-aid) supports the driver in maneuvering in tight spaces.
For the BMW 5-Series (E60, E61) and the BMW 6-Series (E63, E64), the PDC was taken from the E65.
On the E60 PDC has the following new features:
- The PDC button is in the center console switch cluster. The signal from the PDC button is transferred to the PDC control unit through the K-CAN.
- The signal from the reverse-light switch (reverse gear engaged) on vehicles with manual transmission is transferred from the light module to the PDC control unit via the K-CAN.
- Display form of the optical warnings on the Central Information Display (display image).
The PDC measures the distance to objects within its range with ultrasonic sensors.
The driver is warned of an object that could cause a collision as follows:
- Acoustic warning (via multi-audio system controller, M-ASK, and mid-range loudspeaker)
- Visual warning (via Central Information Display)
The PDC uses these two 2 warning functions to offer a degree of comfort for drivers who are hard of hearing or physically impaired.
A fault in the PDC is indicated by a Check-Control message.
PDC is unable to take the place of the driver's personal assessment of obstacles.
The ultrasonic sensors have a blind spot. Objects in this blind spot cannot be detected.
The ability to detect objects can stretch the physical limits of ultrasonic measurements (no or poor reflection of ultrasonic impulses, e.g. trailer tow bars or narrow objects).
Low objects that have already been indicated can "disappear", before a continuous tone sounds (e.g. a high curbstone).
The evaluation of obstacles is thus the responsibility of the driver, even with PDC.
Brief description of components
PDC consists of the following components:
- 8 ultrasonic sensors
There are 4 ultrasonic sensors in each of the front and rear bumpers.
The ultrasonic sensors emit ultrasonic impulses. These ultrasonic impulses are reflected by obstacles (echo impulses).
The ultrasonic sensors receive and amplify these echo impulses. The amplified echo impulses are then converted into a digital signal. Each ultrasonic sensor has its own microprocessor, its own power supply and its own data connection to the PDC control unit.
The measuring range of the ultrasonic sensors is between approx. 25 centimeters and a maximum of approx. 200 centimeters. If the minimum distance that can be detected rises to an impermissible level, a fault message is entered in the fault memory.
Dirt contamination, moisture, ice and snow can cause an impermissible rise in the minimum distance that can be detected.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.