GLA 220cdi AMG Line+++ 8500mls. Had a problem with my sunroof the other day! Nice sunny day and the sunroof would not open, even the sunshade would not retract. Tried all the usual stuff but still no go. Eventually at the dealers after closing car, locking it and waiting a few minutes it all started to work again. A bit emabarrassing as I did try that before calling in to the dealer. Maybe I didn't wait long enough. Good thing it wasn't stuck open in the rain, though it is supposed to close automatically if it rains when left open. Work that one out!