Tried my fog light today and realize it won't power up on the right back side but work fine on the left.
Tried to replace bulb, check the fuses. Cannot find anything or see anything ?
Anyone got any idea ?

 

Only one side is supposed to light up.

 

What? Damn am I that stupid? Haha. I didn't know that. So then its correct? Only left should light up when activated ? =)
Big thanks

 

For as long as I can remember (back to the W123), it's always been just the left side. Other markets may be set up differently, however.

 

For some reason I never even thought about fog lights until I had to test my towbar. Now I learnt something new =)
Thanks again!

 

It's a European thing more than a US thing. Left-hand drive cars will have the left rear fog, and Right-hand drive cars will have the right rear fog. It should always be only one side since in a heavy fog, lit lights on both sides may be mistaken as tail lights or brake lights, confusing the driver behind. I would say they are mandatory in Europe, but my SL does not have a rear fog.

 

All makes sense now. I actually feel stupid not even thinking about this. =)
And as you say. Left / right traffic and different laws with lights in different countries.
Thanks again.

 

We have all been there.
"Welcome to the party, pal!"

 

Haha indeed. 😂