Gmartin202

Hello new to the Mercedes life but have come to really enjoy my w202 and find it to a gateway to more fun. Currently looking into a manual swap I found a 98 slk 230 parting out, I know I’m going to need the transmission, fluid lines, drive shaft, pedals and hardware in order todo so. Them being the same motor this should bolt right on correct? My only concern is the ecu, I know I might have to get it reflashed any recommendations of somewhere I can mail it too so they can do so? And also I know this is worth more than the car is worth but it’ll be a fun beater. Any advice or tips please let me know