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Home >> Mercedes Benz >> 2009 >> E550 Base >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Sliding Roof, Soft Top -- E550 (211.072) >> Basic Knowledge >> Panoramic sliding roof, function - GF77.20-P-4104-02T

Panoramic sliding roof, function - GF77.20-P-4104-02T

Function prerequisites 

Operating procedure 

The following function sequence is initiated by means of the roof system switch (N70s1) or the transmitter key (A8/1):

  1. Lifting the panoramic sliding roof in the pop-up position.
  2. Opening the panoramic sliding roof beyond the pop-up position while simultaneously lifting the wind deflector louvers.
  3. The wind deflector is lifted to its end position while the panoramic sliding roof slides beyond the fixed glass element towards the rear to its end position.

The "closing" sequence for the panoramic sliding roof is analogous to the "opening" sequence.

The panoramic sliding roof is driven by the panoramic sliding roof motor (M12/6m1)

The direction of rotation of the motor is determined by the polarity of the actuation voltage from the overhead control panel control module (N70). The polarity of the actuating voltage is set by means of a two-coil relay (center-zero relay with neutral position). For position measurements, the panoramic sliding roof Hall sensor 1 (M12/6b1) and panoramic sliding roof Hall sensor 2 (M12/6b2) supply pulses which are measured by the overhead control panel control module (N70).

IMPORTANT Use of the panoramic sliding roof as a pop-up roof is only possible when the sun blind is completely open.