Eek, something else to worry about when I put my M276 car in for its service. How can I know that MB are using the right filter? Of course they'll insist that they have.
Puts me in mind of the time many years ago when I had my BMW 520 serviced by a main dealer. The car didn't run correctly at high speed and when I checked it over I saw that the fuel filter had been installed the wrong way round. I returned to the dealership where they put my car into the workshop to be checked. They told me that there was nothing wrong with the filter. After much insistence I managed to persuade them to let me show them what was wrong. In the workshop I pointed to the large arrow on the filter that was pointing towards the fuel tank, so opposite to the flow. The foreman and service manager still insisted that it was right, despite the arrow. They couldn't explain what the arrow was for. It took a junior technician who checked the manual to bravely tell them that they were wrong and I was right. The filter had been modified for that year. Reluctantly they put it right, but with no apology - just excuses. That was my last BMW.