Will condensation damage my LED headlights?

I have a new Mercedes-Benz E300 and when there is a frost there in condensation in both headlights that the selling dealer says is normal. Surely over time this will cause rust inside the headlights?

Asked on 10 January 2022 by John Carr

Answered by Dan Powell
I don't believe this will cause any problems.

The LED headlight unit will have a ventilation system that is designed to prevent pressure from building up and causing any damage. Likewise, the LED unit will be designed to prevent any water ingress.

The ventilation system will inevitably allow air into the unit that will mist up when the air outside is cooler than the air inside the LED headlight.

The condensation will clear when the headlights are active but may remain when the LED daytime running lights are on (as these may not generate the necessary heat to clear the moisture).
Similar questions
My neighbour has just been quoted £800 to replace a headlight bulb on his newish Hyundai saloon. This is because it is a sealed unit that requires much work to remove it from the front wing. Are there...
I recently replaced the high and low beam bulbs with Philips Racingvisoon (Halogen) and noticed a definite improvement. I have always thought that LED bulb replacements would not be road legal in the UK...
I travel to France frequently and among the requirements alongside a breathalyser and hi-vis vests is that is that drivers are required to carry a full set of replacement bulbs. I have just changed my...
 

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 12% on GAP Insurance

Use HJ21 to save on an ALA policy

See offer