what system has this model (timming chain or belt) on 2003 Mercedes-Benz ML350

Can you tell me if this model has a timming chain or belt.
If it's belt when you must change it.
Thank you.

Asked by for the 2003 Mercedes-Benz ML350
1 answer
Your engine has a timing chain luckily it is maintainence free it takes about 7 hours to chance.