lüTTe wrote:The reason is, that the ex class 243/143 can't run faster than 74 mph, only her siblings, class 112 (99 mph) and 114 (87 mph) do that.
The 114 was limited to 87mph (140kph) for quite a short time, but is back set to 99mph (160kph) since a few years.
lüTTe wrote:So the DB meanwhile also has to use its new 143 mph fast 182's (same like ÖBB class 1116) for simple lightweight regional traffic from/to Leipzig!
Well, the ÖBB also uses them for regional trains. And the 182 came from Railion, the freight carrier, they even still have a few. But since the 152 is approved for austria now (the only reason why the DB bought 182), Railion doesn't need them any more. And the regional carrier DB Regio also doesn't really know what to do with these locos. In my opinion it would have been better to give them to the longdistance carrier DB Fernverkehr to support the 101 and 120, at least until the new IC EMUs arrive.
Both the 120 and the 101 are also used for freight trains from time to time to prevent unnecessary and expensive empty runs. The 101 is the last all-purpose locomotive the DB ordered. After that every division ordered locomotives that fit their needs (and only their's
lüTTe wrote:218's are used for IC's due to the lack of other faster diesels in the DB fleet, I think. However, the most IC's track electrified routes ...
I'd agree. The DB would like to replace the slow and uneffective BR 218 (you need two locos for an IC train, one just for heating and electrical supply), but they don't have an alternative. As far as I know there's only the mainline from Hamburg to Westerland, where the 218s pull IC trains, and in single parts of Bavaria around Mühldorf, I guess. But I heard that Munich - Mühldorf is about to be electified.
The 120 in fact is the predecessor of the 101, but the 101 was never aimed to replace the 120. The 120 was the first three-phase current locomotive in Germany, after that no new locomotives were built with classic AC power. (If you exclude the 112/114 that was built, because it was easily available, and is not a real new locomotive but based on the 143.)