REVERSE LIGHT BULBS
Buy decent LED bulbs as a starting point. They also need to be Canbus compatible. Cheap Chinesium shyte off eBay/Amazon will never work properly.
Better yet, fit good quality incandescent bulbs like it was designed for.
https://www.ebay.com/itm/38564396124...G96RATHH378K0Y
https://www.ebay.com/itm/38564396124...G96RATHH378K0Y
And you wonder why they flash and have codes for bulb failures🤦
Just because they fit doesn't mean they'll work, or that you should fit them.
Assuming you have legs, these will technically fit into fishnet crotchless stockings... Doesn't mean you should.😉
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Merc has a wonderful bulb error handling system compared to the utter garbage BMW pedal - so you should be able to get good ones that behave
budget junk and fun with bulb errors is par for the course with LEDs - on a BMW the only real fix is to pull the same current as the original bulbs - by adding a resistor.
Merc has a wonderful bulb error handling system compared to the utter garbage BMW pedal - so you should be able to get good ones that behave
budget junk and fun with bulb errors is par for the course with LEDs - on a BMW the only real fix is to pull the same current as the original bulbs - by adding a resistor.
of course it should cope with quality LED conventional fitment lights - but as eluded too there are lots of different quality LED bulbs out there
LEDs flicker they have hardware to remove it (drivers) they often fail - canbus malarkey is more weird and I have no idea if it marketing or has some validity - they are covered in chips and the new stuff is no longer polarity sensitive (fit either way around)
it doesn't help BMWs cope - but my low watt LED front side lights work perfectly in my W221 they don't misbehave and they have never thrown anything on the dash cluster, nor show faults in diagnostics - the very same bulbs totally misbehave in a BMW - they are 5W5 aka T10 https://auxito.com/collections/car-i...-led-lights/2e
novsight / nighteye make some of the best LEDs I'm aware off
Last edited by BOTUS; Mar 25, 2026 at 04:31 AM.
https://www.ebay.com/itm/385643961243
You cannot change the bulbs in these right?




Im assuming 13 is the backup lamp.




I looked up the 2010 S550 Operators manual and it mentions the HiP bulbs. Then I looked thru the 221.171 parts diagrams and it shows two different bulb carriers that can be installed. One of the carriers does list a W16W / 921 bulb.
My knowledge with electronics is limited especially with understanding can-bus. Easy thing to do is just search on Amazon for 921 led bulbs and check out the specs of the bulbs, see how many watts each bulb is rated for. Other than finding replacement bulbs with the same watts I wouldnt know what would work or not as far as getting bulb warnings.
If you want to really upset the car, as per the OPs first post, buy the cheapest, crappiest.Chinesium tat LED from Amazon or, better yet, TEMU, jam it in an wonder why it doesn't work properly... 🤦
Forcing a traditional bayonet type bulb into the cluster is only going to end in tears.
And we already know how well the LED "upgrade" went.
Last edited by AL5461; Mar 27, 2026 at 02:56 PM.
they say these will work, i have to try it, refund available
On that basis I assume "eejit" would also qualify🤔
Nothing in the listing the OP has posted suggests that they're an improvement by any definition.
Last edited by AL5461; Mar 29, 2026 at 05:09 PM.








