Such items are a matter of taste , personally I would not fit them .
If you do wish to improve the spec of your car , there are plenty of 190's in the breakers surrounding Glasgow and , with luck , you might find items like genuine alloy wheels appropriate to the car , 'taxi' console , illuminated visors , leather interior and various other options your car might be missing . I am generally happy to retrofit genuine accessories that the car might have left the factory with but tend to avoid what I would regard as 'bling' items - all a matter of personal taste and at the end of the day it is your car so don't pay too much attention to the opinions of myself and others .
Eurocarparts do stock various accessories for the 190 as well as OEM parts which are sometimes , BUT NOT ALWAYS , cheaper than buying from the main dealer - always compare prices before buying as sometimes there can be a big difference .