40,505 (A2S4) and C 40,979 (AS4):
Brake adjustment holes
in drums circular and same size as holes in road
Rubber plug used to seal both holes and to
be put in place after tightening wheel on drum.
C 43,849 (A2S4) and C 43,898 (AS4):
ratio raised to 4.875: 1.
only available off the roll rather than ready-cut
E 49,357 onwards:
carburettor incorporating a new type of discharge nozzle and choke
tube to reduce tendency to ice-up.
New propshaft with larger universal joints.
New bevel pinion flange on rear axle to accept propshaft.
E 56,573 onwards:
Longer, stepped dowels used to
locate clutch on flywheel.
Larger holes in flywheel to
Rear reflectors fitted
to conform to new lighting regulations.
New horn of improved performance