C 6.3 question

[Cleaner]

Just purchased 2014 C 6.3 coupe, noticed in traffic engine cooling fan came on...all fine..but later a Fan came on located behind the O/Side headlamp..noticed there is a small radiator there as well...draws air from the inner wheel arch, can anyone tell me what this radiator is for, its not a quite fan at all, did go off after a while. Thanks

[Cleaner]

Thanks im guessing same, but for sure a rather noisy Fan was going for a while, im ex motor engineer of 60 years, so know it was not the Radiator cooling Fan as this Fan is silent running, of course one cant see a lot below the buried area behind the headlamp. Pete.

[Cleaner]

Thanks every one, good that someone else found it very loud...so at least nothing to worry about..its normal....as said "just like a Hoover !!". Pete.