I’ve owned the car from new, no accident, it wasn’t like this 6 months ago, seems to have worked loose, can anybody tell me where the fixing bolts are

 

It looks like the mounting points broke/bent. I'd just take it to Mercedes.

 

I’ve been to the local Merc dealer and they say it has to go to the body shop which is quite a way from me so I thought if it’s a simple fix I could do it myself , looks like I’m going to have to make the trip.

 

I have seen this issue exhibited on a few W205s to varying degrees including my current '15 plate. Prior to this car I briefly owned a 66 plate with multiple alighnment issues including this issue that was eventually bought back by the non local dealer. However its other issues were more significant including damage to the radiator, the drivers headlamp fouling with the grill part of the bumper and the bonnet being misaligned.

At the time I visited my local MB dealer in Yorks for comparison and the majority of their stock exhibited similar pronounced gaps always on the passenger side headlamp as per your photo. After the 66 went back I purchased my current 15 from MB and specifically asked them (over the phone purchase) to check the headlamp and front end alignments and they came back with the all clear and after travelling some 260 miles to that dealer to pick the car up I was only slightly disappointed but not surprised to see the passenger headlamp slightly pronounced from the wing vs the other side. Given my previous experiences and similar observations of other cars and being more confident with the sales team of this dealer and the history of the car and wanting to get on with the return journey I accepted it as designed.

I have been tempted to investigate further but havent being reluctant to make it worse with investigating any adjustments including removing the bumper. The gap on the inside of the headlamp to the grill part of the bumper is fairly even left and right so if you were to pull the affected headlamp in then I suspect it would start to foul the bumper.

It will be interesting to hear how your dealer diagnosis the issue however I wouldnt worry too much and I would definitely try to check out some other W205s to compare...

 

I’ve been to the dealership body shop and they adjusted the fixings to get it back into almost the correct position, I didn’t witness where the fixings were unfortunately, it’s not perfect but it will do, no explanation as to why it happened.

This is my second W205 C63 and my previous one was fine as were the other few, non C63s I looked at.

 

I have a sedan and mine is reverse where the side closer to the license plate frame is sticking out. Going to see if I can get it realigned tomorrow.