Mercedes-Benz W202

Buying a used Mercedes W202 requires a tough rejection of potentially non-repairable engine-box pairs. Below is a risk configurator. If the modification you choose is in the D or E level zone, the repair price of the unit is guaranteed to exceed the market value of the car itself.

Specification of power units and transmission risks

Buying a used Mercedes W202 requires a tough rejection of potentially non-repairable engine-box pairs. Below is a risk configurator. If the modification you choose is in the D or E level zone, the repair price of the unit is guaranteed to exceed the market value of the car itself.

Critical and high risk (D-E level)

Production period and bodywork: the entire production period (1993 – 2001). Found both on pre-restyling and restyling.o Factory motor indices: Modifications OM604.910 (version C220 D) and deforested OM604.915 (version D for taxis).o Available transmissions: Five-speed manual transmission mechanics-5 or four-speed classic automatic transmission-4.o Risk level: E (Critical).o Failure trigger: Diesel fuel flow by the sensors of the TNVD rotor. Elements of the Lucas Epic control system fail, putting the engine in emergency mode (revs are limited to 2000 rpm).o Verdict: Strict prohibition on purchase. The unit does not have mass quality service, and the transfer to mechanical components Bosch is economically impractical.

The release period and body: Strictly dorestyling (1993 - 05.1997). On machines since June 1997, this injection has been completely abolished.o Factory engine indexes: Basic modification M111.920 (1.8 liters, C180 version) and M111.940 (2.0 liters, C200 version).o Available transmissions: manual transmission manual manual transmission ICPP-5 (series 717.4) or automatic automatic automatic automatic transmission-4 (series 722.4).o Risk level: D (High).o Failure trigger: Moisture intake and condensation inside the built-in MAP-sensor ECMS PMS. Leads to signal loss, "troeny" and incorrect idle revolutions (cyclic fluctuations in the range of 500-1500 rpm).o Verdict: Refusal of acquisition. Restoration of blocks is futile, live used parts are in short supply. The minimum discount for the replacement of electronic components of the system is from 80 000 rubles.

Medium Risk Level (B-C)

Issue period: Dorestyling and transition period (1993 – 05. 1997). In the summer of 1997, the inline engine was completely replaced by the V-shaped M112. o Factory engine indices: Modification M104. 941 (2. 8 l, inline "six", version C280). o Available transmissions: Matched with the mechanics of the manual transmission-5, automatic automatic transmission-4 or automatic transmission automatic automatic transmission automatic transmission automatic transmission automatic transmission 5. o Risk level: C (medium). o Trigger failure: Loss tightness and breakdown of the P-shaped gaske of the head of the block. The oil emulsion begins to flow into the expansion tank of the cooling circuit. o Verdict: Potentially dangerous. The architecture of the HBC is sensitive to thermomodes and easily deforms at the slightest overheating, leading to expensive repairs. o Release period: Strictly late restyling (1998 – 2001). Appeared at the final stage of production W202. o Factory Motor Indices: Modifications OM611. 960 (versions C200 CDI and C220 CDI). o Available transmissions: Paired with manual transmission 5 or automatic transmission automatic transmission automatic transmission 5 (series 722. 6). o Risk level: C (Mediocre). o Failure trigger: Burning of copper refractory washers under the nozzles, causing the wells to burn with combustion products ("Black Death"). Ignoring the rules of replacement of seals leads to rigid acidification of nozzles in aluminum HBC, increasing the risk of damage to the unit during dismantling. o Release period: Mainly restyling (1995 – 2001). Massovo went on the bodies with updated electrics. o Factory engine indexes: Modification of the M111. 973 (early version) and the updated M111. 975 (2. 3 liter compressor, version C230K).

Minimum level of risk (Level A)

Release period: Mass restyling (06.1997 – 2001). The transition from the old PMS injection to modern HFM/ME systems coincided with the body update.o Factory Motor Indices: Modifications M111.921 (1.8 liters), M111.941 / M111.945 (2.0 liters, C200 version) and M111.974 (2.3 liters, C230 version).o Available transmissions: Traditional manual transmission mechanics-5 or electronic adaptive automatic transmission-5 (series 722.6).o Risk level: A (Minimum.o).o Failure trigger: Wear or pollution from the mass flow sensor (Optive selection of the Optimum: Optimum air). The most reliable, studied and inexpensive in content bundle of units on the market, which does not have a shortage of components.

Release period: Predominantly pre-restyling and transition period (1993 – 1997). Factory engine indexes: Modification OM601.913 (2.0 l, version C200 D) and five-cylinder OM605.910 (2.5 l, version C250 D).o Available transmissions: Mechanical five-speed gearbox MKPP-5 or four-speed hydromechanics AKPP-4.o Risk level: A (minimum).o Trigger: Compression drop due to natural wear of the cylinder group at a maximum of 700 km: Version. It works efficiently on fuel of any quality. The main disadvantage of the units is an extremely weak acceleration dynamics.

Diagnostics of onboard electrics by years of release

The design of the electronics Mercedes W202 radically updated twice. The year of release of the machine strictly determines the critical point of failure of the onboard network.

Chronology and Vulnerabilities of Electronic Systems

Dorestyling (1993-1995): Breaking motor braid insulation. Factory plastic under the hood crumbles from temperature. The wires are bared and closed, burning the ECU of the engine and throttle. How to check: Gently bend the wire to the HBC temperature sensor. If the insulation cracks, the braid is a replacement. The price of new wiring is from 20 000 rubles.

Transition period (1995-1997): Dissynchronization of the FBS-2 anti-theft system. Due to a failure of the immobilizer, the diodes in the rear-view mirror begin to blink in turn, blocking the starter. How to check: Open the central lock from the regular IR key. If the machine reacts only to a non-standard remote, the FBS-2 is bypassed by handicraft. There's no one to fix it.

Restyling (1997 – 2001): Processor degradation in the EZS ignition lock (FBS-3 system with the Fish key). When installing the key, the steering wheel is not unlocked, the ignition is silent. How to check: Put the key in the lock 10 times in a row. Delayed recognition or activation on the third attempt means the death of the processor. Replacement of the kit from disassembly will cost 30,000-50,000 rubles.

Defection of the power frame and hidden foci of corrosion

Body repair of hinged elements (wings, doors, trunk lid) on the old Mercedes is a standard service regulation. However, through rotting of the carrying skeleton is an unconditional reason for an instant refusal to buy a car. When inspecting the body on the overpass, carefully defect the force zones.

Algorithm of inspection of critical points of the body

1. Glasses (cups) of front springs: Carefully clean the rags of the sparrow joint under the hood and inspect the area below, from the wheel arch. Cracks on the sealant, swelled strip of paint or traces of welding by the electrode are a marker of the tearing of the cup on the go. Stage repairs cost from 40 000 rubles.

2. Drainage plums under the wiper: Lift the floor carpet in the driver's legs to bare metal. Water or through rust under the pedals means the drain of the "one-armed" janitor is clogged. Moisture has been sinking the motor shield for years, destroying the wiring harnesses.

3. Supports of the rear subframe: Look at the four points of attachment of the silentblocks of the subframe to the body on the lift. Cracks around the bolts and a deaf metal blow when the gas is discharged mean the subframe is being ripped out of the spars. The price of recovery with suspension removal is from 50 000 rubles.

Checklist of express inspection by the hood

Before transferring money to the seller, perform a diagnosis of four specific nodes of the Mercedes W202:

• Luft of gear steering: Rock the steering wheel on a silenced car. Free travel of more than 15 degrees at stationary wheels indicates a critical wear of the worm pair. The screw lift will only tighten the steering wheel. Live used reducer costs from 20 000 rubles.

• Cooling pressure: On a hot motor (85-90°C), compress the upper radiator pipe. If the hose is stone and does not push - the gases go into antifreeze due to a pierced gasket of the GBC. Capital repairs will cost from 45 000 rubles.

Vacuum actuators of the stove: Start the engine and alternately switch the blower (legs, glass, face). If the flow goes only in one direction - the tightness of the tubes is broken. For repairs, a complete dismantling of the dashboard will be required.

• Leaks from automatic transmission 722.6: Open the right modular box under the hood and remove the connector from the box control unit (EGS). The presence of transmission oil inside the chip means that it has risen along the wires due to wear of the automatic transmission ossing. Replacement of the sleeve and washing of the block with alcohol is required.

Specification of power units and transmission risks

• Buying a used Mercedes W202 requires a tough rejection of potentially non-repairable engine-box pairs. Below is a risk configurator.

Critical and high risk (D-E level)

• o Failure trigger: Diesel fuel leak through the TNVD rotor sensors.
• Failure trigger: Moisture and condensation within the built-in MAP sensor ECU PMS.
• Leads to signal loss, "troeny" and incorrect idle revolutions (cyclic fluctuations in the range of 500-1500 rpm). o Verdict: Refusal to acquire.

Medium Risk Level (B-C)

• o Failure trigger: Loss of leakage and breakdown of the U-shaped gasket of the block head.
• The oil emulsion begins to flow into the expansion tank of the cooling circuit. o Verdict: Potentially dangerous.
• The architecture of the HBC is sensitive to thermoregulations and easily deforms at the slightest overheating, leading to expensive repairs.
• o Failure trigger: Burning of copper refractory washers under the nozzles, causing wells to be coking with combustion products (“black death”). o Verdict: Endoscopy is required.
• o Failure trigger: Wear of drive supercharger bearings (the appearance of a characteristic metal hum) and lubrication release into the intake tract. o Verdict: Acceptable choice.
• Requires pulley back control before purchase and scheduled oil change in the Charger every 60,000 km.
• o Failure trigger: Gray smoke emission during a cold start due to oil caps and crankcase ventilation (VCG) obstruction.
• Replacement of the full original set of the Twin-Spark ignition system (12 candles) costs from 15 000 rubles.

Minimum level of risk (Level A)

• o Failure trigger: Wear or contamination of the mass flow sensor (MAC) measurement element. o Verdict: Optimal choice.
• o Failure trigger: Compression drop due to natural wear of the cylinder piston group at runs beyond 700,000 km. o Verdict: Maximum resource.

Diagnostics of onboard electrics by years of release

• The year of release of the machine strictly determines the critical point of failure of the onboard network.

Chronology and Vulnerabilities of Electronic Systems

• How to check: Gently bend the wire to the HBC temperature sensor.
• How to check: Open the central lock from the regular IR key.
• How to check: Put the key in the lock 10 times in a row.
• Replacement of the kit from disassembly will cost 30,000-50,000 rubles.

Defection of the power frame and hidden foci of corrosion

• Body repair of hinged elements (wings, doors, trunk lid) on the old Mercedes is a standard service regulation.
• However, through rotting of the carrying skeleton is an unconditional reason for an instant refusal to buy a car.
• When inspecting the body on the overpass, carefully defect the force zones.

Algorithm of inspection of critical points of the body

• Glasses (cups) of front springs: Carefully clean the rags of the sparrow joint under the hood and inspect the area below, from the wheel arch.
• Cracks on the sealant, swelled strip of paint or traces of welding by the electrode are a marker of the tearing of the cup on the go. Stage repairs cost from 40 000 rubles.
• Water or through rust under the pedals means the drain of the "one-armed" janitor is clogged.
• Supports of the rear subframe: Look at the four points of attachment of the silentblocks of the subframe to the body on the lift.
• Cracks around the bolts and a deaf metal blow when the gas is discharged mean the subframe is being ripped out of the spars.

Checklist of express inspection by the hood

• Before transferring money to the seller, perform a diagnosis of four specific nodes of the Mercedes W202:
• • Luft of gear steering: Rock the steering wheel on a silenced car.
• Free travel of more than 15 degrees at stationary wheels indicates a critical wear of the worm pair.
• Capital repairs will cost from 45 000 rubles.
• For repairs, a complete dismantling of the dashboard will be required.
• The presence of transmission oil inside the chip means that it has risen along the wires due to wear of the automatic transmission ossing.
• Replacement of the sleeve and washing of the block with alcohol is required.

• Specification of powertrains and powertrain risks: Buying a used Mercedes W202 requires a tough rejection of potentially non-repairable engine-box pairs. Below is a risk configurator.
• Diagnostics of onboard electrics by years of release: The year of release of the machine rigidly determines the critical point of failure of the onboard network.
• Defection of the power frame and hidden corrosion: Body repair of hinged elements (wings, doors, trunk lid) on the old Mercedes is a standard service regulation.
• Checklist of express inspection at the hood: Before transferring money to the seller, perform a diagnosis of four specific nodes of the Mercedes W202: • Luft steering gearbox: Rock the steering wheel on a silenced car.

Shows, bargaining and re-registration take time: buyers look, promise to think and disappear. Fair price after inspection closes the auction on the spot. If money is needed urgently, the purchase takes away waiting and repeat displays.

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