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Posted

I suspect that my passenger side litronic is not automatically levelling as it should (it doesn't stroke up/down at ignition, the same way as the driver side does.) I read a Renntech post about need to properly align the high-voltage cable, but it looks OK in my headlight unit.

I think i read that a PIWIS can report on a faulty self-levelling litronic headlight unit. Will the PIWIS tell me whether i need a new control unit, or just an electric motor (i'm assuming this is the servo motor for beam vertical rotation)?

Following from that, can the motor be replaced DIY without replacing the control unit? Reason I ask is that PET has a headlight levelling system 'electric motor' part 996 631 135 00, and a 'control unit' part 996 618 151 15.

thanks for any help..

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