Here we have a front timing belt I removed from a 190 a couple of weeks back....
Note the date code......
And then the condition......
So a genuine belt manufactured on the 24th of September 2007, fitted in November 2011 and replaced less than six years later in May 2017, the car it was fitted to had covered just over 38,000 miles since fitting.
The ancillary components, water pump, tensioner and idler were in perfect condition, and the belt was not contaminated.
Discussion welcome on this one
Brian