Mine is a 2012 pre-facelift estate (“combi”). Everything in this post is applicable to a 2008-13 pre-facelift car, and I’m not sure about differences with hatchbacks. When replacing with retrofit LEDs, even ones that claim to be “canbus compatible”, some bulbs work and others don’t. It’s trial and error to find ones that work. The DRLs definitely do generate bulb failure warnings with some LEDs, but not with others. Likewise with rear indicators and reversing lights. I have fitted “Antemoon” LEDs (link below) for DRLs and they work fine with no bulb faults. The only peculiarity is that they flash three times, left then right, when you turn the ignition on. I suspect this is simply the test pulses that the car sends to see if the bulbs are working, and the pulses are normally too short for a halogen bulb to actually light up, but LEDs do because their response time is quicker. Antemoon P21W for DRLs: https://www.amazon.co.uk/dp/B0DP4PYW2K?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_5&th=1 I have tried replacing the front fogs (H8 if I remember correctly), but they don’t work because when turning left or right the car ramps the brightness up and down, and the LEDs aren’t dimmable so don’t respond properly. I’ve also replaced rear indicators. This took a bit of trial and error because some caused a bulb fault, and others were simply too bright and would dazzle following drivers at night. I settled on the following, which work and are a sensible brightness: Argo PY21W for rear indicators: https://www.ebay.co.uk/itm/374844629873?var=643919891661 Note that PY21W filament bulbs do not fit for the rear indicators because the bulb glass physically won’t go through the hole in the light fitting. For conventional bulbs on a pre-facelift you need RY10W, but PY21W LEDs generally do fit. And I’ve done the reversing lights. These are now very white and fairly bright (but not enough to blind anybody). No faults with these particular bulbs. Antemoon W16W for reverse lights: https://www.amazon.co.uk/dp/B0F5B4LK16?ref=ppx_yo2ov_dt_b_fed_asin_title I’m not bothering to try the brake lights or the rear fogs, because the Superb mk2 is very unusual in using single-filament bulbs for both of these and they both do double-duty as tail lights as well. Most cars I’ve owned use dual-filament bulbs for this purpose, but the Superb must be switching the voltage to drive the bulbs at different brightness - which doesn’t generally work with LEDs. Also, matching the brightness with the single tail-lights bulbs will be difficult without it looking like your brake lights are permanently on. I am currently testing a pair of H3 which my car uses as the auxiliary full-beam halogen lights (in addition to the bi-xenons). This pair were the only ones I could find that didn’t have a ridiculously big base, which I suspect wouldn’t fit in the housing. HOWEVER, I have had intermittent bulb faults from one of the bulbs, so I can’t be sure about them yet. Further testing required. Katur H3 bulbs for halogen full-beam (on car with bi-xenons). Note I’m not 100% sure about these: https://www.amazon.co.uk/dp/B0CB5YK3MW?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 It’s worth bearing in mind that LED retrofit headlights and full-beams are an MOT failure if the tester can see that you’ve fitted an LED into a reflector lens, so if I do keep these I’ll have to swap them back for the test. The last thing on my list are the front indicators. On my pre-facelift these are a very unusual bulb - PH24WY, and they look a bit of a pig to get access to. I’ve only found one LED retrofit bulb, and haven’t tried it yet. But these do specifically mention 2008-13 pre-facelift Superb, so I’m hopeful. PH24WY for front indicators (not yet tried): https://www.ebay.co.uk/itm/304561517995 And the above are slightly cheaper direct from the Car Mod Shop web site.