ZIYO ZPL5221 - LED Interior Light Kit Replacement for Mercedes Benz S Class W221 2005-2013, 6000K Xenon White Dome Light Bulbs Upgrage Error Free (W221 2005-2013 (24 Bulbs))

So glad I purchased this led package, you should too!!! First I gotta say is packaging is OUTSTANDING so thank you to manufacturer! The output is crisp clean & bright (not over the top) all bulbs neatly individually organized so don't have to dig around for the one you are working on. The led bulbs are built rather nice construction is sturdy doesn't feel cheap and brittle like others I've experienced (DDM Tuning) . Definitely would buy again. Also note: this kit covered all my whole interior including trunk and licence plate on my S class Mercedes (this vehicle has a lot of them 😎)I'll update pictures later

They don't tell you how to install the bulbs; I followed a YouTube video. Like most things automotive it's easy if you know how. The only difficulty I had was that - as the product description warns us - if you install them backwards they won't work. You just install it the other way and everything's fine, but the light has to be on to check this. It turns out the under door courtesy lights only come on at night, so you have to install these LEDs at night to get them in the right direction. Also, for some reason the trunk lights didn't work until both of them were installed, even though only one incandescent bulb does work.The LEDs are transformational. I didn't really appreciate it in the daylight when I changed out most of them, but at night when I did the courtesy lights I was amazed. In the picture the front door courtesy light is LED, the back door is incandescent.This kit is great. You could track down the individual bulbs and maybe save a couple bucks, but the set saves you the searching and the color is the same across all bulbs, which are top quality and exactly the same size as the originals.

Its very good

UPDATE JUN 2024Drop 1 star. One of the 36mm Bulb starts to flicker and needs to be replaced. Considering the original halogen worked for more than 10 years, yet the supposedly "forever" LED that worked not even 2 years is concerning.ORIGINAL REVIEW OCT 2022It is a box of 20x T10 LED bulbs and 4x 36mm LED bulbs. There is a guide for locations of the bulbs. I have replaced all of the interior bulbs on 2009 S550, which makes a huge difference: from yellow to white in color temperature; it is also much more brighter.After some digging, this is a bit over priced. You could buy them separately and save at least $10. However, I did not know what bulbs to get at first, so I am basically paying extra for "convenience".