lamonsas

hey guys, in the 2011 c300, is there a way to control the intensity of the LED DRL lights as in the intensity of their brightness?

C300CA

I also had the same question. Two weeks ago I went to my dealer asking them to check if there is a way to set LED brightness up. They told me there is no only one brightness setup. a lady pulled in her 2010 C300 Sport model next to me. I clearly saw her LED was so bright just before she turned the engine off. Strange thing is that when she restarted engine, the LED light was as low as my 2011.

I saw somewhere people are talking about 'engineering manual', press and hold "hangup phone" and other two buttons (forgot which) the same time to get into the manual. I tried but nothing popped up.

sagar350z

To get into engineering mode you have to press and hold " Hang up, #, and 1". All from the center console not the steering wheel. Most important thing is to press and hold all 3 buttons for at least 5 seconds. This was the part i was also missing. Good luck.

schvamf

They are brighter during the daytime if the auto headlights are off. Once the headlights come on they dim quite a bit automatically. The only option I was able to find is in the normal settings menu in which I could disable the DRL, but no intensity settings.

C300CA

I tried it and still nothing. I tried with no key, key in position 1 and 2, waited more than 10 seconds, nothing. Maybe 2011 US version does not have it?

Ron Jr

They do I poked around in it. Hold Hang UP, # and 1 for 5 seconds then release. I have always doen it with the key in engine off and command on service. Never had a problem. I always turn on the backup camera on loaners if it has MM just to be childish of course.

C300CA

Yes I found the "comand on service" is what I previously missed. Thank you.

Yes, there is no LED light intensity setup.

dcjwlee

Might be a stupid response. Our e class coupe LED sticks dim when the headlights are turned on.

Maybe you have your DRL's running? (Not the LED's, but the actual headlight running as a DRL.) This would make your LED's dim in the daytime too.

Maybe.