Refinishing Park Assist Sensors: Mercedes-Benz

Park assist sensors are part of the park assist system, just one of many advanced driver assistance systems (ADAS) found on vehicles today. Damaged sensors are typically replaced and may require painting to match the vehicle. Vehicle makers often provide information on the painting of new sensors. Some vehicle makers do not recommend refinishing sensors with minor finish damage because excessive paint thickness may adversely affect the operation of the park assist system. However, other vehicle makers allow refinishing and provide guidelines. Let’s see what Mercedes-Benz has to say.

In vehicle-specific service manuals Mercedes-Benz provides a document titled: Information On Painting PARKTRONICS System Sensors. When it comes to refinishing park assist sensors, Mercedes-Benz states:

  • "PARKTRONIC sensors are to be painted in the corresponding vehicle color if the part number ends with 9999 or additional information 420 is present in XENTRY Parts Information.
  • PARKTRONIC sensors must be at least 70 um up to a maximum of 120 um.
  • Deviating paint thicknesses will cause the diaphragm to detune, thereby causing everything from measurement accuracy issues up to system failure."

To find this document:

  1. Click on Standard Search
  2. Click on the + to expand the category Groups tree
  3. Scroll down and click on 98 Paintwork (this populates the Groups search filter)
  4. Click on the + beneath Information Types
  5. Click on All Information Types (right-hand side)
  6. Click on the Search button
  7. Read the information on the popup window and click Ok to proceed
  8. Open General Notes: Passenger Cars: Paintwork by clicking the Eye Icon (right-hand side)
  9. Scroll down to Information On Painting PARKTRONIC System Sensors
  10. To open, click on the hyperlink (right-hand side)

Follow OEM procedures and warnings to help ensure a complete, safe, and quality repair.

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