MB 308d -more power!
 

Have a 1991 MB308d with the 601.940 59hp motor.Cruises at 110 all day with no problem and getting a average of 0.7l per mil milage which is great, but up hills and towing it just gives up.I turned up the injector pump on my old 1987 model and it did wonders but there is no screw on the back of this pump only a plate which I suspect is covering the adjuster,Any ideas?