SLK 230 (170.447) L4-2.3L SC (111.973) (2000)
Parking Assist Distance Sensor: All Technical Service Bulletins
Parking Assist System - Erroneous Activation
Date: September 17, 2008
Order No.: P-B-54.65/86a
Supersedes: P-B-54.65/86 dated April 13, 2003
Applicable Models Updated / Note Added (cause and remedy)
All Models Equipped with Parktronic (SA Code 220)
Erroneous Parktronic Activation
Parktronic, the optional vehicle parking assist system, can be erroneously activated with or without warning tones by the following conditions as noted
The causes mentioned can lead to complaints that may be unduplicatable at the workshop. The workshop technician should thoroughly inspect
the Parktronic sensors for interferance, cleanliness, and proper orientation.
Accessory license plate frames installed on the front bumper.
Incorrect front license plate orientation.
Other detachable accessories that are located within range of the Parktronic sensors.
Decreased vehicle ride height, resulting in an echo from the ground.
Snow, slush, hail, and sleet.
A gush of water, running down the vehicle's hood over the Parktronic sensors when the vehicle is braking.
Sensors heavily soiled.
Extraneous ultrasonic sources such as air brakes, jackhammer, etc.
In ground electrical induction loops, located at traffic lights or in basement garages.
Waste heat, from excessively heated engines (exhaust), forms in front of the vehicle when stopped.
Replacing sensors or control modules will not resolve the false activation. The sensitivity of the Parktronic system is a result of its design, and
is required for accurate operation. Please inform the customers accordingly. Additionally, present to the customer the information contained
within the vehicle's operating instructions, concerning Parktronic operation.