2001 CLK 320 MAF Sensor ?
 

Anyone out there with info?
Had stuttering problem from standing start, fault code was MAF circuit fault. Had new MAF sensor fitted, now have a horrendous flat spot at 5,000 rpm when accelerating hard from standstill. All error codes cleared, no engine management fault, been advised that codes may not have been completely cleared or incorrectly cleared or that ECU needs re-map. Any ideas as to what could be the problem ?