2016 Mercedes Benz E400 E450 C450 M276 Belt Tensioner Serpentine Belt Replacement

I had a Belt tensioner fail on a 2016 E400 with M276DELA BiTurbo Engine, and didn't see any KZbin Videos or Write-ups on how to change it. So here you go. Hope it helps!

[@sflb83]

Bro! Phuckn badass. I have to change the belt on my 2016 c450. Im going for it. Thanks for this video!

[@Toneydark]

You're welcome 🙏🏾

[@verter2454]

Good job man. What was the mileage when the tensioner failed? Need to do the same thing on my c450, just a preventative maintenance. But E class seems to have more more than C. Did you replace any of the pulleys? I saw another video removing the charge pipes, move intercooler close to the radiator and then do the job, but yours is equally difficult and will try out.

[@Toneydark]

Thanks! ~104k mi. I didn't change any other pulleys. Just the tensioner and the belt. I tried to loosen the charge pipes for the intercooler, but it wasn't worth the hassle.

[@twoc400s5]

Tons of good info here! Can you drop a link to those sockets that fit in the 3/4 wrench?

[@d.l.4867]

That set I've had for something like 20 yrs. I bought it from Autozone back in the day. I don't think the company makes them anymore, but they are called Ampro Go-thru Hex Geared sockets. There may be other variants out there though. Look up Ampro T45810. That set could work.

[@AdamKhan-ro4op]

At 5:08, you used a 1/4 ratchet with a small extension to 3/8th, but which e-torx bit did you use if you remember to loosen/tighten the tensioner?

[@Toneydark]

I think it was an e12. E10 or e12. I got the whole set from amazon or Harbour freight.

[@AdamKhan-ro4op]

Thanks! I’m going to try to toss on a new tensioner, as well as replace the idler/drive pulleys soon. Getting things prepared now. Belt hasn’t snapped yet, but preventative maintenance is my aim.

[@toggAmerica]

Hello how long time take it belt with tensioner replacement

[@Toneydark]

With the right tools and a second set of hands to fish out the old belt and fish in the new one, about 2 hours.