MB do stipulate a 2-year brake-fluid change as part of the service schedule. However, the confusion is arising because of the way they choose to 'price' their online (and normal) servicing; it's simply smoke and mirrors to make it appear cheaper, IMHO, and also, to a degree, simplifies things in that some are 2-year items, some 3-year (pan roof), some 4-year (filters).
Having said that, pollen filters are 2-years and listed as part if a B service. The yearly/mileage schedules used to be listed in the service booklet although, based on my newest one, they aren't listed anymore, so unless somebody understands the system or researches what the schedule is, they're at the mercy of the dealer and 'computer says'.
The difference between a decent garage/mechanic/specialist is that they can offer informed advice/opinion as to whether it's okay, or better, to service/check/change some items ahead of schedule, or perhaps delay slightly, depending on use. Main dealers (not just MB) will, for obvious reasons, only do what the 'system' says, even to the extent (I'm aware of one main dealer, not MB) refusing to undertake an early oil/filter change, which the customer wanted and wished to pay for, because the 'system won't allow us to'. It isn't listed as due, therefore, it cannot be done.
Having said that, pollen filters are 2-years and listed as part if a B service. The yearly/mileage schedules used to be listed in the service booklet although, based on my newest one, they aren't listed anymore, so unless somebody understands the system or researches what the schedule is, they're at the mercy of the dealer and 'computer says'.
The difference between a decent garage/mechanic/specialist is that they can offer informed advice/opinion as to whether it's okay, or better, to service/check/change some items ahead of schedule, or perhaps delay slightly, depending on use. Main dealers (not just MB) will, for obvious reasons, only do what the 'system' says, even to the extent (I'm aware of one main dealer, not MB) refusing to undertake an early oil/filter change, which the customer wanted and wished to pay for, because the 'system won't allow us to'. It isn't listed as due, therefore, it cannot be done.