Does anybody have Ebrake getting stuck when the vehicle its on D from stop. usually happens when it rains but happens to me also when its dry. It seems like the car gets stuck for a sec then the ebrake releases. please share if you guys found the problem

Nothing is getting stuck. You seem to be unaware of a feature that every MB has, and you are triggering it unbeknownst to you. Have you not noticed that the word HOLD lights up in the instrument cluster at the same time? It's called the HOLD function and is activated by pushing the brake pedal in further once you have come to a stop. It's all explained in your owner's manual. The below is from my owner's manual, but it's the same in every MB. Some people have a bit of a hard time with it, but once you figure out how it works, it's great. The brakes release automatically once you step on the throttle. Porsche and Mercedes use this on-demand style of engaging it. Other brands like BMW etc. engage it via a button in the center console and then it comes on automatically every time you come to a stop. I find this approach annoying. The way MB and Porsche do it is much better as you have full control over when you want the car to hold and when not via the brake pedal.

i wasn't talking about the HOLD brake, i know how that works. i am talking about the ELECTRONIC BRAKE that goes on when the car is in PARK or open the door while you stopped on gear. But thanks the for the infos.

Your phrasing is a bit confusing. Is this happening after the car was parked and you first put it in D to drive off? If so, that's an issue that's been discussed before. It happens when the pads seize to the rotors due to corrosion. Typically happens if the car gets parked with wet brakes after rain or a car wash, or you live in a humid environment. It's surface rust the can build and temporally seize the pads to the rotors. It's more common on performance brakes. One way to avoid it is to make sure that especially after a car wash you go for a quick drive and step on the brakes a few times to heat them up and dry the rotors and pads before parking it. If you do live in a wet environment or during the winter when there's salt, you may also wanna manually release the e-brake after turning off the car, so that the pads are not in contact with the rotors and potentially seize due to the naturally occurring corrosion.