95 C280, only running on 4 cylinders

[shawncisco]

I believe the # 2 and # 6 cyclinfers are not getting a signal at the fuel injector. I'm a little confused if this could be the injectors or if maybe it might be the coil. I think both those cylinders run off the same coil.
My local dealer wants $250 to retrieve the trouble codes, and it seems no one other than the dealer has the equipment to get the trouble codes. So everyone has a different reason for why they think the car is running the way it is.
It hasn't been that long sence I changed the coil connectors, and as far as I can tell the Overload relay looks ok. I see no cracks in the sauter and the fuse is good.
Does all this point towards a bad coil and if so how much am I going to spend to replace it?