The Distronic on my 2009 AMG CL63 does not work when near Cambridge and Manchester airports. MB tell me that this is because the radar systems there override the rader system in the car. I cannot believe that MB did not anticipate this when they designed the system which is all about safety. Which other airfields are 'broadcasting' at the frequencies appropriate to Distronic to render it useless? Is this a recognised problem in Europe and elsewhere or am I being fed a line of porkies?