01.04.1991

Group 35
Rear Axle

Modified ASD hydraulic unit: The measuring connection on the housing has been dispensed with as it is integrated in the pressure limiting valve

01.05.1991

As of
120.980 000667

Group 13
Air compressor, belt drives

Material of air pump carrier modified to dye casting; was sand casting

01.06.1991

As of
119.970 002578
119.971 001094

Group 07
Mixture formation

The O-rings at the fuel injection valve have been modified. Resistant to cold temperatures down to -40 °C

06.1991

Group 07
Mixture formation

Color-coded variable reference resistors have been installed. Models: with TWC green variable reference resistors, without TWC white variable reference resistor

06.1991

As of A006943

Group 83
Heating and ventilation

New auxiliary fan with aluminum shroud

06.1991

As of A006995

Group 83
Heating and ventilation

Switching to the CFC-free refrigerant R134a

01.07.1991

As of
119.970 002949
119.971 001289

Group 13
Air compressor, belt drives

A spacer ring has been installed in front of the bush in the belt pulley as a phased-in measure

01.07.1991

As of
119.970 002486
119.971 001049

Group 13
Air compressor, belt drives

Material of air pump carrier modified to dye casting; was sand casting

01.07.1991

As of
119.970 003625
119.971 001537

Group 15
Electrical system – engine

Distributor rotors with stiffening ribs have been installed.This reduces fractures and high voltage arcing

07.1991

Group 32
Springs,suspension and hydraulics

Apply to all models with level control and ADS

Rear damper valves setting revised to combatknocking noises at the rear

01.08.1991

As of
119.970 004377
119.971 001819
120.980 003432

Group 13
Air compressor, belt drives

A spacer ring has been installed in front of the bush in the belt pulley as a phased-in measure

01.08.1991

Group 14
Exhaust manifold

The exhaust manifolds have been modified at the flange position.The piping of the exhaust system in the engine compartment has been matched to the modified exhaust manifold

01.09.1991

As of
119.970 006248
119.971 002731

Group 13
Air compressor, belt drives

The diameter of the air pump belt pulley has been modified(Ø 104 mm, was Ø 88.5 mm)

15.09.1991

Group 41
Propeller shaft

Installation of a vibration damper on the rear propeller shaft to optimize noise characteristics

09.1991

As of A023719

Group 42
Brakes

The 300 SE/L with steel rims has the more stable four-disc fixed caliper brake of the eight-cylinder models instead of the floating caliper brake, which is prone to wear

10.1991

Group 82
Electrical system

Taillamp modification: Hinges on taillamp housing reinforced, better retention

15.10.1991

As of A033950

Group 46
Steering

Bolted connection of steering shaft and steering coupling: The M8 hexagon socket bolt with snap ring has been changed over to a M10 self-locking hexagon socket bolt

11.1991

As of A036951

Group 46
Steering

2nd version of steering lock: The light-alloy protective sleeve and the steering lock part with joint (1st version) has been replaced by a plastic protective sleeve with steering lock part without joint (2nd version)

15.11.1991

Group 41
Propeller shaft

The diameter of the rear propeller shaft has been changed overfrom 60 to 80 mm, improving noise characteristics in the engine speed range of 4000-5200 rpm

15.11.1991

Group 41
Propeller shaft

To standardize with models 140.056.140.057 and 140.07.the clamp connection of the propeller shaft has been replaced by aslide connection. A large universal joint has been used.

01.01.1992

As of
119.970 013434
119.971 006370

Group 13
Air compressor, belt drives

A modified material has been used for the air pump carrier (GD AL SI 10 MG, was GD AL SI 9 CU3); in addition, the ribs have been reinforced

03.1992

Group 15
Electrical system – engine

New 90 A generator (compact generator)

05.1992

As of A086003

Group 72
Doors

Central locking switch moved from driver’s door panel to the center console

01.05.1992

As of A080817

Group 15
Electrical system – engine

High voltage distributor cap and high voltage distributor rotor have been converted to carbon to avoid cracking.

01.06.1992

As of
119.970 023574
119.971 010680

Group 13
Air compressor, belt drives

A modified fit washer has been used for attaching the air pump to the carrier

01.06.1992

Group 35
Rear Axle

Modified ASD hydraulic unit: As of production breakpoint the ASD hydraulic unit without accumulator has an operating pressure of 60 to 63 bar

08.1992

Group 35
Rear Axle

Shim spacing for ASR axle speed sensor: The distance between wheelspeed sensor and connecting flange (rotor) has been enlarged by 0.3 mm so that no useful signal is induced when stationary

03.08.1992

Group 41
Propeller shaft

Propeller shaft intermediate bearing: To optimize noise characteristics, the propeller shaft intermediate bearing has been changed from an inner to an outer V-fold

08.1992

As of A096695

Group 33
Front axle

Rear wishbone mount of lower wishbone: Hydraulic bearings (4g) replace rubber mounts (4c) with washer. Spare parts stocks now only include hydraulic bearings

08.1992

As of A101970

Group 82
Electrical system

Changed from Becker Silverstone BE0980 10-Discs CD Changer to Apline MC3192 6-Discs CD Changer

01.09.1992

As of
119.970 026391
119.971 011693
120.980 015811

Group 07
Mixture formation

Modified fuel injectionvalves have been used. The fuel outlet(a)has been converted from 4 to 2holes which results in improved fuelformation.
Due to the arrangement of the holes (a)the fuel forms 2 streams when it flowsout which spray the fuel onto both inletvalves as a finely atomized spray

01.09.1992

As of
119.970 028099
119.971 013709

Group 14
Exhaust manifold

The material of the exhaust manifold for cylinders 1, 4, 5 and 8 has been modified for cost reasons (previously grey cast iron Si Mo 51.now grey cast iron 40)

01.10.1992

Group 49
Exhaust system

Catalytic converter coating modified: Since the production breakpoint the monolith has been coated with germanlum

10.1992

Group 33
Front axle

Front wheel bearing: The contact spring and washer on the front wheel mount are notused anymore

10.1992

Group 32
Springs,suspension and hydraulics

Apply to all models with level control and ADS

A modified oil drain plug (3p) without connector (3m)
is installed in the level controller (3) (version B).
An oil drain plug with connector (3m) was installed
previously (version A)

01.11.1992

As of
120.980 017400

Group 14
Exhaust manifold

The 4 – 6 and 10 – 12 cylinder exhaust manifolds have been provided with an air gap insulation between the outer and inner pipe as a phased-in measure

12.1992

As of A120932

Group 32
Springs,suspension and hydraulics

By changing the shock absorbers or struts, bump stops and the assignment of spring rubber bearings on the front axle as well as modified rear springs, the vehicle level is lowered by approx. 10mm

01.1993

Group 83
Heating and ventilation

A refrigerant shut-off valve (Y67)with improved noise characteristics has been installed.

01.03.1993

Group 41
Propeller shaft

To standardize with models 140.056.140.057 and 140.07.the clamp connection of the propeller shaft has been replaced by a slide connection.

03.1993

As of A128374

Group 83
Heating and ventilation

The refrigerant injection nozzle(107) is no longer located in the rear air conditioning evaporator (13)due to noise reasons; a modified refrigerant injection valve (107)is installed in the refrigerant shut-off valve (Y67).

03.1993

As of A130213

Group 46
Steering

4th version of steering lock: The 2nd or 3rd versions of the steering lock (A) have been replaced by a steering lock (B) with only one locking pin and plastic protective sleeve (36d) with a predetermined breaking point

01.04.1993

Group 83
Heating and ventilation

Control cables have been installed instead of the flexible shafts used previously for actuation of the center and side nozzles to ensure more exact actuation without play.

13.04.1993

Group 80
Central locking system

To ensure quick extension of the striker eye (100) and thereby quick locking the power locking feature for the trunk lid has been replaced by “Power locking with quick release”.

30.04.1993

As of A123446

Group 83
Heating and ventilation

The vacuum connections on the valve block for the two diverter flap vacuum elementsnave been eliminated. The side nozzle diverter flaps therefore no longer have any function, i.e. the air always flowsthrough the evaporator and the heater core to the side nozzles.

05.1993

Group 32
Springs,suspension and hydraulics

Front ADS shock absorber units: optimized production procedures for lower mount

06.1993

As of A151633

Group 01
Engine housing

Engine 104.994 replaces 104.990 with a resonance variable intake manifold and an injection system with hot-film air mass measurement (HFM)

06.1993

Group 54
Electronical system

Export vehicles shipped overseas froma German North Sea port are equipped with a battery disconnection switch.

07.1993

Modified rear damper: the connections are plugged directly into the damper valve (in luggage compartmenton earlier versions). An adapter line is supplied with the damper valve in the standard package contents

07.1993

Group 32
Springs,suspension and hydraulics

Wheel/body acceleration sensor: modified casing, interchangeable with earlier version

27.07.1993

Group 47
Fuel system

The black anti-rust coating on the fuel tank has been cut

08.1993

As of A144704

Group 83
Heating and ventilation

The module box blower motor and the motor activation feature of the base module will be phased-out

08.1993

As of A155558

Group 72
Doors

The exterior mirror on the driver’s side is equipped with an aspherically curved mirror glass. This increases the viewing angle from 16° to 48° and virtually eliminates the “blind spot”

09.1993

Group 82
Electrical system

New MB radios (Classic, Spezial, Exquisit)with four output stages and integrated fader.

10.1993

Rear strut assemblies : upper strut mount bushing modified to suppress knocking noises

10.1993

Group 72
Doors

New smaller key fob. No longer available with the old key storage box

12.10.1993

As of A166260

Group 46
Steering

Modified steering coupling: Steering coupling (B) made of light alloy installed. The connection between the corrugated tube and the steering coupling as well as the securing screws have therefore changed

01.11.1993

Group 91
Front seats

Length of head restraint arms and guide rail modified: As part of standardization, head restraints with 30 mm reduced head restraint stays are fitted in the standard vehicles. The adiustment range of the guide rail was shortened at the same time

11.1993

Group 42
Brakes

Parking brake adjusting mechanism modified: In the course of standardization, the same adjusting mechanism isbeing installed on the wheel as on models 129, 202

11.1993

Group 54
Electronical system

Modified electronic circuit board speedometer with liquid crystal display acoustic warning for parking brake and modified diagnosis sequence.

01.01.1994

Group 13
Air compressor, belt drives

As a result of the rapid heating up of the catalytic converter the air pump has been discontinued with the exception of the following national versions: CH, S, N, A, USA, J, FIN

01.01.1994

Group 14
Exhaust manifold

In order to reach the operating temperature more quickly, an exhaust manifold in a double-wall design (insulated by an air gap) is installed

01.01.1994

Group 49
Exhaust system

Modified front exhaust pipes: The resonance bodies of the front exhaust pipes have been discontinued. The shape and cross section of the three way catalytic converter has been modified (standardized catalvtic converter)

01.01.1994

As of A182368

Group 83
Heating and ventilation

The main air flap vacuum element has been eliminated on the fresh air/recirculated air control, the main air flap vacuum element is designed as a single-stage version only.

01.01.1994

Group 91
Front seats

Backrest attachment at seat adjuster of driver backrest modified: the backrest is installed with a modified backrest attachment on the seat adiuster

01.1994

As of A184315

Group 33
Front axle

Upper wishbone mount: The mount (6d) of the upper wishbone (6) has been changed over from plain rubber mount to torsion mount

02.1994

As of A187335

The speed-dependent windshield wiper system was eliminated from production

02.1994

As of A187478

Front ADS shock absorber units: the connector plugs are inserted directly into the damper valves (connection previously located inengine compartment)

01.03.1994

Group 09
Air intake

Metal intermediate flange is installed betweenintake manifold and cylinder head in place of the rubber intermediateflange.

03.1994

Group 15
Electrical system – engine

Modified generator: 143 A compact generator

03.1994

Group 32
Springs,suspension and hydraulics

Springs weight reduction by: Change of material, reduction of wire diameter, coil diameter is 96 mm as of the second bottom coil (rear axle)

03.1994

As of A192209

Group 40
Wheels

Three new light alloy disc wheels are available
15-hole light alloy disc wheel
(7 1/2 Jx 16 H2 ET 51)
New design

8-hole alloy disc wheel
(7 1/2 Jx 16 H2 ET 51)
Weight-optimized and increased gloss level

5-hole alloy disc wheel
(8 1/2 Jx 18 H2 ET 47)

Group 68
Panelling

Group 69
Covering and lining

Fabric trim added to the cover of the vanity mirror on the headliner

Group 72
Doors

Group 82
Electrical system

Headlamp unit modifications: Equipped with free-form reflectors; a common reflector with individual reflector surfaces for low beam, high beam and foglamp. Due to increased reflector efficiency, headlamps are approximately 30% brighter than previous version. Low beam bulb (H7). Lens without plastic frame. Headlamp unit with external adjustment feature

Group 88
Detachable body components

Bumpers
The exterior shape of the front and rear bumpers is distinguished by a horizontal line (arrow).The front license plate mounting is therefore also changed

Exterior panels
Due to a pronounced inward taper of the lower portion of the bumpers and side panels as well as a separation of these parts by a horizontal line (arrows), the vehicle appears leaner and lower

Trunk lid
The rear end differs by the modified taillamp units and the rounded lower corners of the trunk lid. The reflector strip follows the new rounded contour of the trunk lid.The reflector strip section below the trunk lid is now a one-piece construction

Engine hood
A vertical crease is in the center of the chrome radiator grill.The spacing of the horizontal bars on the radiator grill has been modified.The spacing of the bars differs between the 6 and 8-cylinder models and the 12-cylinder model. To further distinguish the 12-cylinder model, additional chrome trim strips are included on the horizontal bars.

03.1994

Group 47
Fuel sytstem

Activated charcoal filter enlarged: Activated charcoal filter enlarged from 1.15 liters to 3.5 liters, modified diameter and material of connection hoses. As a result fewer fuel vaporspass to atmosphere

04.1994

As of A196184

As of engine:
944 10/50,20/60 000509
944 12/52,22/62 004535
994 12/52,22/62 020624

The oil cooler, which used to be located behind the front bumper, is now located near the oil filter

01.04.1994

Group 35
Rear Axle

Attaching torque strut to rear axle carrier: The cam plates on the front fixing of the torque strut on the rear axle carrier are no longer used

05.1994

As of A204158

Group 82
Electrical system

The windshield washer fluid level sight glass was eliminated in production as a running change

01.06.1994

Group 35
Rear Axle

Rear axle center assembly: for weight optimization reasons and due to the use of ASR and ETS, a rear axle center assembly with a 198 mm diameter (previously 210 mm) crown wheel without side bearing covers has been installed.

08.06.1994

As of A208407

Group 41
Propeller shaft

Length of rear propeller shaft modified. Due to the conversion of the rear axle center assembly to a crownwheel dia. of 198 mm, previously rear axle center assembly with 210 mm crown wheel dia.

07.1994

As of A212245

Group 32
Springs,suspension and hydraulics

The new adaptive damping system (ADS ll) features an enhanced ADS regulating system (improved control mode). With the new regulating system, wheel andbody damping forces respond better to ever changing road conditions and driving styles, while the body is additionally stabilized.

01.09.1994

Group 47
Fuel sytstem

The previous double fuel pump set has been replaced as aphased-in measure by a Pierburg fuel pump (screw spindle pump). Steel fuel pipe from fuel pump to fuel filter replaced by fuelhose. Installed with hose clips. Fuel feed pipe no longer bolted on, but inserted and installedwith hose clip.

11.1994

As of A235576

Group 35
Rear Axle

Rear end stops of subframe rubber mounts canceled.

12.1994

As of A242084

Group 27
Automatic transmission

Modified selector lever. 600 models have the “V12” lettering embedded. The selector lever handle can now be pulled off the selector lever.

17.03.1995

Group 80
Central locking system

Universal ATA control modules have been installed. These control modules have replaced all previous ATA control modules for models 129, 140, 202.

01.04.1995

Group 47
Fuel system

Lever sender replaces immersed pipe sender, with fastened with a bayonet catch and pressure sensor (arrow) for purging the activated charcoal canister (USA only).

03.04.1995

Group 46
Steering

5th version of steering lock: Modified steering lock with cap (36b) has been installed in models 129 and 140.The previous bolted control cable for the parking lock interlock has been modified and is now developed as a bayonet lock.

24.04.1995

Group 35
Rear Axle

Modified rear axle shaft rubber boot and hose clamp: The rear axle shaft rubber boot has been modified and the hoseclamp width reduced from 9 mm to 7 mm.

04.1995

Group 15
Electrical system – engine

New 115 A generator. Improved efficiency at lower speed.

04.1995

Group 82
Electrical system

The AM rear window antenna amplifier has been standardized for the sedan, long sedan and coupe.

The electronic circuitry for the antenna amplifier (A2/19) has been modified to eliminate interference.

12.06.1995

Group 41
Propeller shaft

To standardize with models 140.056.140.057 and 140.07.the clamp connection of the propeller shaft has been replaced by aslide connection.

01.09.1995

Group 83
Heating and ventilation

The relays (K9 and K9/1) and thepreresistors (R15 and R15/1)required foractuation of the auxiliary fan(M4) have beenreplaced by the auxiliary fan control module(N65/1)on all engines installed.Actuation is accomplished via the auxiliaryfan control module(N65/1).

The new AAC pushbutton control module (N22) is equipped with a K1 serial interface (data bus from instrument cluster topushbutton control module) and K2 (data busfrom pushbutton control module to instrumentcluster).

The smog sensor (B31) is also installed incombination with the new AAC pushbutton control module. The smog sensor (B31) allows automatic switchover from fresh air to recirculated air depending on the percentage of CO-/NOx in the outside air when the activated charcoal filter button on the AAC pushbutton control module is pressed.

The refrigerant pressure sensor (B12) familiar from model series 210 and the refrigerant temperature sensor (B12/1)are installed on the fluid reservoir. An observation glass for the refrigerant level check is no longer present.The refrigerant level is checked by the refrigerant pressure sensor (B12) and the refrigerant temperature sensor (B12/1) via the AAC pushbutton control module.

The 7-stage A/C compressor 7SB16C fitted is a completely new development:
Function and operation corresponds to the predecessor 6CA17 Shorter and lighter in construction
Suction and pressure lines are individually flange-mounted
1-pin electrical connection
Pistons are moved directly by the swashplate (no conrods).

The sun sensor (B32) in combination with the newly installed AAC pushbutton control module provides for more precise control of the temperature.The sun sensor (B32) transfers the values measured for the sun intensity to the AAC push buttoncontrol module which regulates the blower speed and/or the cooling capacity.

09.1995

Group 42
Brakes

The hexagon on the connection of the brake hose on the brake pipe is not used anymore. There are now 2 elevations (arrow) on the connector which lock in the multi-tooth opening the brake hose bracket. When tightened, the hose is prevented from turning by the brakehose bracket. When loosening, ensure that the brake hose bracket is not deformed.

09.1995

As of A290167

Group 46
Steering

6th version of steering lock: Steering lock with modified parking lock connection (37a).The parking lock connection (37a) can be unhooked/hooked up by pressing in the tab (arrow)and moving it at the same time.

09.1995

Group 68
Panelling

The center console wood trim changed from two-part to one-part

31.01.1996

Group 35
Rear Axle

Rear axle shafts: The core hole bore and machining of the end face of the shaft journal has been dispensed with on rear axle shafts with forged centers

01.01.1997

Group 33
Front Axle
Group 35
Rear Axle

The surface protection of the bolted connection of suspension has been changed over to Dacromet. The color of this bolted connection is silver or blue

01.06.1997

Group 46
Steering

The surface protection of the steering gear bolts on the front axle carrier have been changed over to Dacromet. The color of these bolts is silver or blue. Previously the color of the bolts was yellow (high-polished galvanized)