No lift pump on later Superbs with 163bhp BDG engine - only the earlier ones have it, so check if you have one before worrying
Here is the breakdown of 2.5TDI V6 problems from the very beginning, partly explaining why this engine has poor reputation which is no longer deserved because the problems have long been fixed (at least last 6 years).
1997-2001 - AFB, AKN (150bhp), and early AKE(180bhp) - all hell breaks loose.
Here is the list of most painful issues:
Crankcase breather filter problems leading to blown out seals and oil leaks, oil pump drive problems, camshaft wear, hydraulic valve tappets wear, fuel pump and injector failures due to less than perfect ECU software, yes a software problem causing pump and injection failure, MAF failures except AKE which had Hitachi MAF.
2002-2004 - AYM 155bhp (Superb), later AKE 180bhp - fixed software problems and no more VP44 injection pump problems, failure rate in line with VP37 from now on, at least on VW Group cars.
Camshaft wear and oil system problems still persist.
2004-onwards - BCZ, BAU, BDG (163bhp, Superb), BDH engines get updated camshaft roller arms, and other modifications. In fact, the valve train is pretty much the same on BDG as on current 2.7TDIV6 and 3.0TDI V6. No more tappet and oil system problems (oil system problems were due to metal filings from the cam lobes and tappets).
So let us put to rest the 2.5TDI engine trouble history because since 2004 it is just that, history.