Just a couple of additions to what has been said previously. The M, H and E suffix to the model number of the 2 series had nothing to do with the cab, it related to the chassis gauge and axle ratings, M being medium Scania wouldn't have wanted to say light, this was for normal highway use and came with a 11500kg (25300lb) drive axle, H was heavy and had a heavier frame and a 13000kg (28600lb) drive and E or extra heavy was for serious heavy haul with 16000kg (35200lb) drive often in tandem for double drive. Don't forget in Europe we don't use 6x4 like in North America, the Swedes run at 70tonnes (154,000lbs) on 7 axles on ice roads still with single drive.
The DS11 ranged from 280bhp to 380bhp, the last one being partly electronic using the Bosch EDC system, it's not true to say the others varied only by pump setting, many made this mistake and learnt the expensive way. Don't forget that Scania, in fact all European made engines of this period, used installed output figures so roughly 20-30 less than the same unit measured to US standards of the time.
