Hello colleagues,

I have a MK2 superb 2011, 2.0L, 140HP, engine code CFFB.

One week ago, after 40mins drive to work, I noticed a very strong smell of burned electronics, or ebonite or hard rubber. It was coming from the engine compartment, right side, around the engine air filter. I could smell it even the second day after driving many kms.

I checked the engine temp. but it was not very hot. I checked the alternator (maybe the diodes) - 13.7V so I think it is ok. I checked the fuse box from the right side, next to the battery - all is ok. In general I checked with the flash light everywhere I could see in the engine compartment and I did not see anything wrong. Engine works fine, all features work as designed, I did also a diagnostic and I have no reported errors in the memory.

Still, I will go abroad for vacation soon and I would like to identify the root cause before and not be stressed because of this.

Anybody had a similar issue or anybody knows how to deal with such cases, what more I could check?

Where is the ECM located ?

Thanks for any hints!

I've read a case (don't know where I read it though) of a wiring loom below the battery which got damaged. It's on my list to check if I ever have my battery removed. In your case that would be the first place I would look.

Just remove the battery and the battery tray and the loom should be accessible.

Will do, thanks!

Sometimes if you spill some oil on top up you may get a burning smell on some cars ?

Could the smell be from DPF regeneration? If so you might have heard the engine revving after it was switched off. Also I wouldn't expect the smell to hang around.

To be honest I don't know how the dpf smells. Mine is broken, I have a black exhaust pipe so I thingk regenerationn does not do much. Anyway I drove 500+km since without issues orn other smells

14 hours ago, gav_is_con said:

Sometimes if you spill some oil on top up you may get a burning smell on some cars ?

Oil level is correct, I have 12kkm since the last oil change and i did not do anything oil related prior tonthe event

In my experience, burned electronics have a distinctive and very different smell to oil.