HELP! - Weird Nut/Bolt When Removing W218 CLS Rear Bumper

[KillerHERTZ]

Currently trying to remove my rear bumper on my CLS63 AMG so I can fit the Carbon diffuser, all is going well apart from the 2 bolts which hold the main section to the chassis.

According to a YouTube video they are 10mm bits which is fine, however on mine they have a long stem pointing upwards so I am unable to attach a socket. ive tried prising it downwards to no avail, nor is there enough space to get some pilers in.

Any ideas?

And from above:

 

[MercedesDriver]

My guess you’ll need something like this 3/8" Drive 6-Point Metric 10 mm Flank Drive® Flare Nut Socket

 

[st13phil]

A deep ring spanner (assuming you can get it over the end of the bolt), or a crow's foot spanner may work?

 

[chrisk2010]

My guess you’ll need something like this 3/8" Drive 6-Point Metric 10 mm Flank Drive® Flare Nut Socket

I was just looking at these yesterday funily enough in a tool flyer that gets sent to work.

I wish had come across them years ago when working on forklifts thye look quite handy.

 

[Codger49]

This one at £3.99 might be more appropriate for a one time use.

Flare Nut Crow Foot Spanner Various Sizes 10mm to 22mm Available | eBay

 

[Piff]

Something like this Mono Tap Back Nut Box Spanner
or Adjustable Basin Wrench
?

 

[Wolfie1]

Are you sure your bumper has to come off to fit a rear diffuser? I changed mine on my c class with the bumper in place, wouldnt have thought them to be that different

 

[cheddar]

until I purchased the correct extra-deep 10mm socket, I managed these gripping a normal deep 10mm socket using long-nosed pliers inside where your extention would normally go..... those nuts aren't very tight as they clamp plastic down. mercedes use the same setup on many different models these days.

 

[Justintyme]

From the pics, I would try an ordinary open end spanner first...these nuts would not be that tight.