Initial Inspection and Diagnostic Overview

Functional Description

The rear spoiler raises automatically when the vehicle speed reaches 150 km/h (approx. 94 mph). If, at this speed the sunroof is open or raised then the sunroof will close automatically.

If the vehicle speed drops below 130 km/h (approx. 81 mph) the rear spoiler will lower automatically. The sunroof will open again.

The Rear spoiler control module -J223- detects malfunctions in the rear spoiler system and stores these in a non-volatile memory.

Using On Board Diagnosis (OBD) the malfunctions can be read and repairs undertaken using Guided Fault Finding.







A malfunction in the rear spoiler system is indicated via the rear spoiler warning lamp -arrow- when in the automatic mode. The warning lamp also lights up when rear spoiler is raised manually. Component Tests and General Diagnostics

WARNING: The behavior of the vehicle can change at high speeds if the spoiler does not move into the raised position.

After the ignition is switched on, the warning lamp comes on for about 4 seconds and then goes out again.

A malfunction is present if the warning lamp lights up again. Check DTC memory. With Manufacturer's Scan Tool

After having changed the Rear spoiler control module -J223- or after interrupting the voltage supply, the control module is initialized when the spoiler is raised and lowered manually for the first time (or a vehicle speed of 20 km/h is reached). When doing this, the control module ending points (rear spoiler lowered and raised) are detected and stored.

During this initialization the gradual lowering for the "manual" lowering and raising is not active. Component Tests and General Diagnostics