Ok I was tired last night, & couldn't find the original info that I had used to write this thread 5yrs ago, so here goes:-!!!
Start from Basics:-
Stand behind car looking at exhausts, & there are two main types:-
1. twin exhaust boxes, with one outlet on left side & one on right side.
2. single exhaust box with one outlet on left side & aero cover for now empty exhaust box cavity on right side.
ETKA parts diagrams:-
The aero cover for the cavity on the right side is:-
5G9-825-205B (for cars built after 28/04/2014)
5G9-825-205D (for cars built before 28/04/2014)
There is also this item:-
5G9-825-205E (for cars built after 04/11/2013)
ALL the above items are listed as "right side" under Item No 33 in the ETKA Drawing No. 825-000 (VW being as helpful as ever...NOT).
So is the "E" rights side or left side & can we fit it to our cars?
To make matters worse NONE of the above covers are shown in the ERWIN official workshop manuals!!
PR codes:-
Parts ending "B" & "D" have the following PR codes:-
0F5 = fuel system for diesel engine.
1A4 = fuel system multifuel.
1A5 = fuel system for fuel-injected engine.
1A7 = fuel system for fuel-injected engine (tropicalized)
1A8 = diesel plus fuel system with water trap.
4P3 = rear floor panel module, type 4
Parts ending "E" have the following PR codes:-
0N1 = standard rear axle
FM1 = Bluemotion Variant.
Again not 100% clear except that "E" is for the basic torsion beam rear axle, & "Bluemotion Variant".
However, Bluemotion is tagged to even my 1.4lt 140/150PS engines, however the only full "Bluemotion" trim spec was the 1lt petrol, & the 1.6lt diesel.
Cross referencing:-
Looking at the workshop manuals for the exhaust systems & cross checking it with the ETKA parts drawings gives a fuller picture:-
1. ALL the low powered 1lt & 1.2lt petrol engines, & 1.6lt diesel engines have the torsion beam rear axle.
2. ALL these same engines in the estate have a rear exhaust box across the car under the rear seat area as the torsion beam axle makes more space there for it.
3. ALL these same engines in the estate have ONLY a pipe running from under the rear seat area past the rear wheel & exiting the rear bumper.
Conclusion:-
1. ALL cars with the rear torsion beam (& lower engine spec) will have the same rear "pipe" exhaust system & thus "should" have the "E" trim panel fitted from factory (as shown the the MK3 Skoda Octavia picture)
2. ALL cars with the rear multi-link axle (& higher engine spec) have an exhaust box which fills this area & thus the "E" trim part CANNOT be fitted as the exhaust box hangs down in the way.
I hope this puts the matter to rest. I can only think I did not mention it as it can only be fitted to cars which should have it from the factory, & cannot be retro fitted to any other specification cars. I might post this above info in the front section of this thread to add clarity, as its causing headaches!!!