Every time it smells like there is an oil leak, but the Machamire days he doesn’t not see any oil spill

What is your question?

Smell is from the engine, like something is burning, sometimes even when I am at the traffic light

What makes this problem better or worse?

If I drive

How long has your 2011 Mercedes-Benz GLK350 had this problem?

Since I bought it about 3 years ago