A Engine – A1, A2, A3, A4, A5
B Transmission – B1
C Tail Shafts – C1
D Rear Axles – D1, D2, D3
E Front Axle – E1, E2, E3
F Suspension – F1, F2
G Brakes – G1, G2, G3, G4, G5, G6, G7, G8
H Chassis – H1, H2, H3, H4, H5, H6
J Body Mounting – J1, J3
K Cabin – K1, K2, K3, K5, K6
M Fuel – M1
P Tow Coupling – P1, P2
R Vehicle Mounted Lifting Systems – R1, R2
S Vehicle Rating – S1, S2, S3, S7, S8, S9, S11, S12
T Tow Trucks – T1, T2
Z Vehicle Identification – Z1, Z2