I have a 1992 300SD that had a complete long block replaced about 14 months ago.....my engine was burning a quart every 175 miles according to the MB dealer oil consumption test.
The technition told me the new engine had beefier rods and a completely different head design than the older engine..also said that there was a myriad of updated design of parts such as the engine shock absorber,mounts etc
One thing I have noticed about the replacement engines(the two I have heard) is that the new engine is louder than the original...no sure why that is??(heavier internal parts?)
The engines on these cars were originally whisper quiet...you almost had to stand right next to it to know it was diesel
now the car can go between oil changes(4-5K) and not burn any oil.According to the MB zone rep they have never had a replacement longblock fail..........we'll see I guess ...I have 30K on the replacement engine and thus only have 20K miles worth of warranty left which will run out before the 34 months left will

Jim did the dealer offer you a fair deal on the trade in ?


Warren
1992 300SD
Columbus Ohio