Vin Number

Congratulations! Now you can update your profile with a G. Yours probably rolled off the production line in Graz a day after mine, they're almost twins.
Here's what the Russian MB club decoder says (ignore the interior colours, often off):

VIN WDB46322727076122
Model 300GE/G300
Chassis 46322727076122
Engine 103987 22 001410
Transmission 722397 23 510600
tCase 750650 20 004915
Order 6 1 537 04691
Approx. year not defined
Cab 463538 20
Steer 765503 20 N91025
Dealer Great Britain (537)
Paint
5929 nautical blue metallic
Options
A02 joint heads, chromium plated (с 1978)
A11 axle ratio fast
A52 track enlargement
A70 differential lock, front axle (с 1978)
B02 braking system, anti-lock (abs) (с 1978)
C27 reinforced front springs (с 1978)
D27 electric tilting/sliding/lifting sunroof (с 1978)
D39 multiway connector
E43 trailer plug socket, thirteen-pin
cassette holder (с 26.06.1997)
E51 bicycle rack, alustyle (double) (с 1978)
short-range interference suppression
F46 headlamp wiper/washer (с 1978)
G40 automatic transmission (с 1978)
H02 air conditioner (с 1978)
H10 heater for driver's seat and co-driver's seat (с 1978)
H20 heat-absorbing glass all round (с 1978)
J11 speedometer reading in km/miles
J65 outside temperature indicator (с 1978)
K00 adhesive label with refueling instructions
K89 exhaust emission control system with catalytic converter with closed loop control (с 1978)
P39 enlarged fenders use wide tires (с 1978)
Q55 trailer coupling, reinforced, ball-head type, low mounted d96/4 (с 1978)
R78 light alloy wheels for wide tires (с 1978)
S34 passenger compartment seat headrests (с 1978)
S37 driver's seat armrest (с 1978)
S38 co-driver's seat armrest (с 1978)
U46 rub strip all-round (с 26.09.1996)
leather seat cover
V15 interior trim, in cream beige (с 1978)
V35 steering wheel and gearshift lever with leather cover (с 1978)
V50 window lifter, electric, double (с 1978)
V63 luggage nets on backrests (с 1978)
X03 leather, designo-blue, uni-color (с 06.02.1998)
X59 leather, designo-dark green, two-color (с 1978)
central locking system
580 air conditioner/Tempmatic (с 01.11.1982)
Behr air conditioner (с 01.04.1970 по 31.10.1982)
581 Thermoking air conditioner (с 01.04.1970 по 31.12.1972)
automatic climate control (с 01.01.1977)