I was quoted $275 for labor by my local dealer to change all my spark plugs. I've done plenty of spark plugs replacements before but just not an this ML63. I've searched but didn't find any specific W166 M157 instructions; thus, can anyone point me in the right direction for this DIY? Saving a few bucks would greatly be appreciated.

Thanks in advance.

 

Check the E63 forum it's there. Its not hard but it does take a little time and tools.