I am/did not imply that sunroof "Service" is part of ANY normal
"Scheduled Maintenance" schema promoted by ANY Franchised dealer.
You'd have to request it,specifically!

What I did say is that IF Sunroof Maintenance had been performed, y'all
would know BECAUSE the Stealerships charge so much for it.

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Wunnerful,that your chassis has been provided such excellent protection
from the elements.
THAT still doesn't negate the need for proper cleaning and lubrication of the
Sunroof.

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Can you please show us the section of the Mercedes FSM that requires a
"ReSync" of the Sunroof after each "Power Down" of the electrical supply.
(AKA Battery source removal from the chassis's electrical system)

I do not believe this is a necessary step,after Battery removal !

There are no Memory Capable/Microchip/Computerized Functional Parts in
the Sunroof.
The ONLY "Synch-ing" possible is a function of the Mechanical Clutch VS
the On/Off micros-switches in the Drive Motor.
AND to them Battery Removal appears the same as KOEO
(Key Out,Engine Off)

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'84 300SD sold
124.128