Greetings, I just acquired a 2015 CLS 350 AMG Line from a dealership in London, which is a 3.5-hour journey from my residence.
I was informed that the outside headlight unit included moisture inside the lens at the time of purchase. Upon inspection during collection, it seemed that the device had been tampered with, and I requested a replacement unit to be supplied to me. To which they consented. The item has not yet been sent, and the existing unit was functioning well, although with an occasional error indicating a malfunction in the intelligent lighting system; nonetheless, all lights operated correctly, so the situation is acceptable for the time being.
Last night, the offside indication and dipped beam ceased functioning, and the screen indicates a failure of the nearside turn signal, but it remains operational.
Could these issues be attributed to the control module absorbing moisture from the unsealed unit? What is the optimal course of action about this matter?