my Left hand factory fitted DRL burned out and found virtually no information on this online, so I thought I'd join up and create this walkthrough.

error message


light not working


found the problem


GL DRL part number 1648200956 (164 820 09 56) required for left - LEFT AND RIGHT ARE DIFFERENT UNITS
interchangeable with ML DRL part number 1649060351 (left) 1649060451 (right)
always double check part numbers before ordering replacements.


replacement pair direct from china


parts arrived in 2 weeks


trim removal


with bottom clips released, pull out and towards the middle of the car


light exposed


T25 Torx required for retaining srews


light and trim fall forward exposing the wiring


use flat head screwdriver to release the retaining clip on the wiring connector, then just pull connector off


then just pull connector off


new light fitted by simply reversing steps using new light unit. test before reattaching trim


new light is less yellow than original


if you're going to replace one then it's worth replacing both


result is a nice, clean white light and no error on the dashboard.

For your only post, just want to say thanks for taking the time to document the process. Helpful to me as I mess with my DRLs.