'85 380SL Acceleration
 

After two stints in the shop I'm still experiencing acceleration issues. Once it comes out of the shop it accelerates beautifully for 2 or 3 weeks - then when you press on the accelerator initially it revs properly and begins to move then you get a lack of acceleration then it picks up speed again. Fuel filter has been changed along with several other things. Any ideas?

There's a number of things it could be. I'd probably look for dirty injectors first, then a vacuum leak.