H!

I have a 2012 Mercedes E350 Bluetec (V6 turbo diesel engine) with 73k miles.  Unfortunately even though I used Mobil 1 5w-30 oil at 5k oil change intervals the engine is suffering from sludge build-up in the intake from EGR gases.  I now realize that I should have been using a low ash, low sulfure, low phosphorus oil like Mobil 1 ESP to avoid this situation.
I need a spray like the Penrite P26 DIESEL FOAMING INTAKE CLEANER.  According to the manufacturer you sell this spray cleaner.  Is this true?

Kindest regards,
Steve