Found out that this fault code under EOBD has a description that differs that from Mercedes fault description.

That being ......
P2459 (mercedes) DPF regeneration not O.K!
P2459 (EOBD) DPF regeneration frequency too high!

Could it be that the system is trying to regen & not meeting requirements to reset the regen paremeters & counters.

Noticed that on other DPF regen issues that the oil reset counter (if it has one) not being reset causing constant unsucessful regens.

Service indicator showing not due for appox. 10,000 miles or 240 days!!!

Any pointers?