If your car has the HK upgrade (option code 810) then they will be Harman Kardon speakers. Otherwise they are standard Mercedes cheap speakers, unless the previous owner had one of our speaker upgrades
We do a nice package that changes all the speakers in the standard CLK for decent Morel ones and with some tweeking and accoustic tuning, transform the sound in the car. This option is also available for cars with HK where it further improves the dynamic range, clarity and responsiveness of the speakers. Prices start at £600 inc.
We have my B class here for demo which has HK amp and ten speakers. Except the door speakers are now Morel and there has been some 'tweeking'. It sounds amazing:bannana:
I've always found the standard Mercedes audio in my E-Classes to be very good, maybe your last car didn't have great sounds and you're just noticing the difference?
The option code 810 is the same for HK or Bose. Its proper term is 810 - sound system.
If the badges say Bose then its Bose speakers you have. These speakers are pretty good but benefit greatly from being driven by a different amp but that means a different head unit also!