Baldy Nohairs

Hello, I've been researching around on how to replace the spark plugs myself. I have a 2013 glk 350 with a m276 engine. I see many different posts that lead me to almost nothing. I've replaced spark plugs many times in other vehicles, but never a Benz. The only thing I can find is to remove the intake manifold, which is the last thing I want to do since this isn't really my car and I don't want to get myself stuck in such a task. On the left side (passenger side) I have to remove the air filter, which isn't a problem for me, but I'm just wondering to get in there do I actually have to remove the manifold? Thanks!