Operating instructions

SERVICING
4 Carburettor(s)
The old oil is drained off by removing the drain plug on the sump. Draining
should take place after driving when the oil is still warm.
For lengthy motorway driving fuel with an octane rating of 97 (ROT*) can also
be used for the B 20 B engine.
At each engine oil change, check that the oil level in the centre spindle of the
carburettor(s) is about 6 mm (
1
/
4
") from the top of the spindle. If it is not, top
up to the level using oil ATF, type A (transmission oil).
The carburettors are adjusted and tested in a test bench at the factory with a
CO-meter. No subsequent checking or setting of the carburettors is necessary
other than in connection with repairs to or replacement of the carburettors.
* Research Method
5
Gearbox, M 40
6
The oil in the gearbox should be checked after every 10 000 km (6 000 miles).
The oil should be at the level of the filler hole. Top up with the recommended
oil if necessary. The oil in the gearbox should be changed after every 40 000
km (25 000 miles). In the case of a new or reconditioned gearbox, the oil should
be changed after the first 5000 km (3 000 miles), on which occasion the gearbox
should be thoroughly flushed with oil of the same type to be subsequently used.
The old oil should be drained off immediately after the vehicle has been run
when the oil is still warm.
32
9
Rear axle with differential brake
10 A rear axle fitted with differential brake is filled at the factory with transmission
oil according to the American military standard MIL-L-2105 B provided with
an additive for rear axles with differential brake. The same type of oil should
be used for topping up and when changing. Oil level checking and changing
should take place at the same intervals and in the same way as for a rear axle
without differential brake.
33
SERVICING
7 Rear axle
8 The oil level in the rear axle should be checked after every 10 000 km (6 000
miles). The oil should be up to the level of the filler hole. Top up with the re-
commended oil if necessary.
The oil in the rear axle should be changed after the first 5 000 km (3 000 miles),
and should also be flushed thoroughly with the same type of oil used for top-
ping up. The used oil should be drained off immediately after the vehicle has
been run, when the oil is still warm.
After this oil change, only the oil level need be checked and topping up take
place if necessary.