I have a 2011 VW Jetta with the 5 cylinder engine and 197k miles. I am having trouble with cylinder #1 misfiring. I have replaced all the coils and all of the plugs. After replacement of the plug it will run good for a few miles then starts shaking again with cylinder #1 misfire. If I change the plug again to a new one it will do the same with running smooth for a few miles then starts shaking again with cylinder #1 misfire.

The other issue I am having is that the coolant seems to be disappearing out of the coolant reservoir. I did notice a spray of coolant in between the engine and under the reservoir area and noticed some coolant pooled in that same area. Might be part of the same issue or 2 separate issues going on.