Parktronic - False alarm

[pilotc182]

Took my E 211 to the local dealer to report a faulty front parktronic system. Pulling up to T junctions/roundabouts etc with no obstacles ahead the front markers (occasionally) go directly to 2+2 reds (no oranges) and the whistle. Strange thing is it only seemed to happen in bright sunshine.
Dealer advises this is a known 'feature' in extremes of temperature be it hot or cold, can also happen in heavy rain. MB apparently aware
Am I being naive but - whats the point in having something that you can't use reliably in the Winter (cold) , Summer (hot), Spring or Autumn (wet)

 

[DieselE]

Maybe your car was just whistling at the sexy SLK in front.

So far, touch wood, I've not had any problems with Parktronic whatever the weather. I did get a false alarm in very cold weather but as there was a build up of ice on the sensors it wasn't really a system problem.

 

[C240Sport97]

my front sensors have gone on the blink twice when I was stuck behind London buses with their nasty smelly hot diesel engines at the back

 

[glojo]

Regarding the 211,
Ours is also rock solid but don't forget they also point slightly out to the front sides (If you know what I mean?) I wonder if something is quite close alongside you?

If anything I would prefer the alarm to activate a bit further from the object. The lights are acceptable.

John