I once bought a fuel filter for my 98 Honda del Sol from MANN. The Price was very high, (30 € IIRC) the label stated "Made in China". Oh yes.... German Quality.
The filter leaked extremly badly, there was a big fuel fountain in the engine bay after starting. Right beside the Battery and main Electric. Good feeling if you sit inside the car and watch this.
After thorughly checking i found out that the filter was bad.
I complained about that to the customer servie of MANN.
The reaction from MANN was rude and they gave me a could shoulder, but at least they confessed that there was a problem: There was a bad batch of fuel filters, now they changed the supplier of the filters.
That´s it. No Sorry or something...
I asked them why they dont recalled the bad fuel filters from the dealers, but i dont get any answer...
Customer care in Germany IS rude sometimes, yes, but that was a new highscore!
So, i never will buy a MANN Filter again, its only MAHLE now for me. All filters from MAHLE that i bought and used where labeld "Made in Austria" and worked well.