noticed this weekend on both headlights the corners filled with steam, now surely thats a warrenty item as it means the headlights are no longer sealed, what do you think? Anyone else with this problem (cars 2 years old now)
I really doubt any manufacturer's headlights are sealed. Finally there need to be a way to change the bulb. And even if special rubber protectors are in place, these are rather 'splash-proof' than fully sealing the headlight unit. Also connectors that go trough protector are latched rather than molded, so not 100% sealed. So everything depends external conditions (humidity, temperature changes) and some condensation might occur. Maybe taillight, that are LED based and it is not possible for them to replace individual LEDs are fully sealed. ... just my 2 cents.
A few years ago I had a large spider that took up residence in the headlight of a CLK320 with xenons. Spider was fried and Mercedes had to fit a new headlamp cos they couldn't get it out.....thankfully under warranty.
Even Range Rovers get condensation in the headlamps which is considered normal.