I have the opportunity of transplanting the engine and gearbox out of a 1977 450SEL into my 1975 SEL . The 77 model was picked up for parts by my regular mechanic interior reasonable , exterior (paint) is terrible clear nearly all gone leaving faded mid green paint. Surprise was it runs really well just 150,000ks
Versus my 1975 with 338,000ks on the clock
Took it for a run with mechanics trade plates attached, very smooth gear change
Plenty of power , no smoke on hard acceleration.
I am...