Be careful about jumping to conclusions. The E36 TUV certificate may cover the "part family" of raceland coils, basically a set of part numbers (probably regardless of application). The TUV cert is for quality, documentation, and basic strength/reliability type testing done to prove the design. Generally speaking, the E36 and E46 application are similar enough that they may be covered. I can't translate german, but I do know that for fuel cell cars, holding one TUV cert for the fuel cell part numbers enables you to use it in different make and model cars (how I spend my days).
- 10.5:1, PB cammed M30B35, Miller WAR and MAF, style 29's and style 5's, urethane everywhere, revalved Bilsteins
500/450 Coilovers, Vorshlag camber plates, UUC SSK, Mason Eng. strut bars
Hella H1/H4's, Schroth Rallye 3's, Dinan 25/19 sways, e32 750i brakes, Bav Auto headers, M5 clutch and FW