2000 ML 320 Tune-UP
I'm new to this forum but wanted to ask a question. My 2000 ML 320 has about 108,000 miles and I've owned it since 45,000. Never had a problem with it but recently I've noticed that it's much much louder at idle than when I first purchased it. Is this because it needs a tune-up? I'm scheduled for a tune-up at the end of March and just wanted to get a ballpark figure how much a Tune-up (100,000) is and what is replaced? Is this something I can DIY?