CL500: Keyless Go and Bi-Xenon problems


Active Senior Members
May 14, 2013
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Yorkshire, The French Alps & Quahog
Your Mercedes
CL500 (2001): Distronic, Bose, Keyless Go; Honda CR-V EX (2011)
I've just got a 2001 CL500 that has beeen unused for some time.

  • Using the Keycard I can unlock the doors by touching the door handle and can start the car with the gearstick button. However on exiting the car I can't lock it using either of the door buttons nor the one on the boot lid. Any suggestions?

  • On dipped beam the light output is next to useless and the 2 dipped xenons are slightly different colours. Does the light quality change/fade with age on these or is there some other problem? Also, what does bi-xenon actually mean? I assumed it meant that the (inner) main beam lights would also be xenon but these are clearly just normal halogen.
Many thanks.


Senior Member
Dec 21, 2006
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Your Mercedes
CLS55 AMG '05
Can't help with the keyless go but the xenons, yes, the output deteriorates with age. Bi-xenon means the xenon unit can supply both dipped and high beam by using a movable shield to create the dipped beam pattern. Generally the second pair of headlights are halogen as xenons don't like being 'flashed".
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