mercedes a class gearbox ecu problem

[slevan]

Hi guys and girls I'm a newbie to this forum my names Jordan and I've recently purchased an A class. The car's beautiful it's my first mercedes I've owned low mileage really clean motor, however it's recently developed a problem, when you move the gear selector into drive or reverse there's a nasty judder or bang happens most the time. Now when you drive it's fine going up and down the gears, so I ran my DIY code reader with is not the most expensive system going and received two codes both p0600 cleared them and they simply come back. I did some research on the Web and came across Lofty's home page talking about the FTC/ECU being problematic so I've drained the gearbox pulled out the suspect Part and sent it to the recommended people ( ECU testing Ltd). Now it's been looked at and they told me it's beyond repair nothing more was really said as to why. I need help in what to do next is it a case of buying a second hand box from the same year and engine size and just a ecu swop, or will it need to be programmed or reset? Im fully experienced to do most the work myself just not programming or anything similar. I would be really grateful if anyone can help as I'm completely out of options, best to ask you guys. Thanks