Mercedes-Benz Cls reliability

On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.

Fix: Replace the steering gear mounting bolts on the affected vehicles with steel bolts. Should the bolts break or already be broken change the steering gear.

Recalled models: CLS · 51,251 vehicles

On affected vehicles the bonding between the glass panel and the sliding roof frame might not meet specifications. In consequence a separation of the glass panel from the vehicle cannot be excluded.

Fix: Check the glass panel and replace the sliding roof if necessary.

Recalled models: CLS · 3,267 vehicles

On certain E-Class vehicles the attachment for the 12V battery in the luggage compartment may not withstand the loads in the event of an accident.

Fix: Install an additional fixation of the 12V battery on the affected vehicles.

Recalled models: CLS · 3,645 vehicles

The transmission wiring harness might not be routed according to specifications.

Fix: Fit additional bracket to optimise the wiring routing. Check the harness connections and rework if necessary.

Recalled models: CLS · 2,456 vehicles

On certain vehicles the software of the engine control unit might not meet specifications.

Fix: Conduct an update the software of the engine control unit on the affected vehicles.

Recalled models: CLS · 51 vehicles

On certain vehicles with a Diesel engine the coolant pump which is controlled by vacuum might have a leakage between the vacuum system and the coolant circuit.

Fix: Update the software of the coolant pump and replace the electrical switch valve on the affected vehicles.

Recalled models: CLS · 35,624 vehicles

On vehicles with a fixed�caliper�brake system the mounting screws of the�calipers�on the front axle may not meet specifications.

Fix: Replace the screws on the front brake�calipers�on the affected vehicles.�

Recalled models: CLS · 72 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS(218) · 50,390 vehicles

The bonding between the glass panel and the sliding roof frame might not meet specifications.

Fix: Check the glass panel bonding on the affected vehicles and replace the sliding roof if necessary.

Recalled models: CLS · 310 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS · 108,971 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS(218) · 86,604 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS(218) · 90,716 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS(218) · 10,410 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS(257) · 162,581 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS(218) · 81,267 vehicles

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: CLS(257) · 106,665 vehicles

The software of certain communication modules may not meet specifications.

Fix: Carry out an update to the software of the communication module on affected vehicles.

Recalled models: CLS · 36 vehicles

On affected vehicles the software of the communication module for the emergency call system does not meet the specification

Fix: Update the software of the communication module for the emergency call system

Recalled models: CLS · 3,127 vehicles

The seat belt warning function does not meet the specification

Fix: Activate the correct seat belt warning scenario in the instrument cluster

Recalled models: CLS · 45 vehicles

Improve the vehicle emissions via software updates.

Fix: Update the relevant control unit�s software and if necessary replace the NOx sensors.

Recalled models: CLS · 994 vehicles

The HV battery pack can overheat and result in the venting of hot gas which can ignite vehicle components or in extreme cases the entire vehicle.

Fix: To prevent a vehicle fire the vehicles should not be charged using the external charging cable and the vehicles should only be driven using the default Auto EV mode only

Recalled models: CLS · 124 vehicles

A correctly fastened seat belt could be detected as not fastened impairing the restraint system

Fix: Check the relevant seat belt buckles in the affected vehicles and replace if necessary

Recalled models: CLS · 15,652 vehicles

The bonding between the glass panel and the sliding roof frame might not meet specifications

Fix: Check the glass panel bonding on the affected vehicles and replace the sliding roof if necessary

Recalled models: CLS · 18,132 vehicles

The electric line for the power supply of the engine coolant pump might chafe on the engine fan.

Fix: Check and repair damage if required. The routing of the electric line will be modified in order to prevent potential contact with the engine fan.

Recalled models: CLS · 230 vehicles

; The software of the radar control unit might not meet the specification

Fix: Update the software of the radar sensor control unit on the affected vehicles.

Recalled models: CLS · 294 vehicles

Improve the vehicle emissions via software updates.

Fix: Update the diesel engine control unit software and add a supplementary booklet for the operator's manual

Recalled models: CLS · 25,647 vehicles

The ECO Start-Stop function may be disabled and cause the vehicle to stall.

Fix: The affected vehicles are to be recalled and the software updated.

Recalled models: CLS · 69 vehicles

Incorrect calibration of the front passenger occupant classification system.

Fix: Replace the seat cushion of the front passenger seat.

Recalled models: CLS · 151 vehicles

The riveting of the seat belt housing cover at the front seats may not comply with the specification.

Fix: Replace the driver and front passenger side seat belts in the affected vehicles.

Recalled models: CLS · 52 vehicles

Where a control unit coding was updated in a workshop between 3 December 2016 and 5 December 2016 the coding may not correspond to the specification and may trigger unplanned action in the vehicle. The safety and emissions systems may not react as design intent.

Fix: Recall the vehicles that are likely to be affected and update the software in the corresponding control units.

Recalled models: CLS · 42 vehicles

The high pressure fuel lines have not been manufactured to the correct specification which over time can lead to crack formation and fuel leaking. Fuel escaping in the presence of an ignition source could lead to fire.

Fix: Recall the vehicles that are likely to be affected and replace the high pressure fuel lines.

Recalled models: CLS · 1,327 vehicles

The engine compartment seal may not be fully secure. There is a possibility that the seal may become dislodged and fall between the engine and the fire wall. If this occurs it is possible for the seal to contact very hot items such as the catalytic converter and a fire to start.

Fix: Recall the vehicles that are likely to be affected and fit a new seal with fittings.

Recalled models: CLS · 3 vehicles

A seal between bonnet and engine compartment may when the bonnet is opened temporarily stick to the bonnet. If this happens the seal may detach form its fixing and can fall into the gap between engine and partition wall. It is then possible the seal can make contact with the exhaust and under certain conditions catch fire.

Fix: On affected vehicles install additional clips to retain the seal.

Recalled models: CLS · 3,863 vehicles

On certain diesel engines the 'O' ring may not have been produced to the correct specification. This may allow oil to leak and contaminate the environment. If excessive oil is lost engine damage may occur.

Fix: On affected vehicles replace the chain tensioner sealing ring.

Recalled models: CLS · 61,672 vehicles

It is possible that the bonnet striker may not have been correctly torqued. If the striker works loose for any reason it is possible that the bonnet may not be secure fly up and obstruct the drivers view to the front.

Fix: Recall affected vehicles check the bonnet striker and re-torque if required.

Recalled models: CLS · 1 vehicles

Fuel leaks in the plug area of the drain opening may occur at the fuel filter with integrated fuel heaters. Fuel can escape and is noticeable to the customer due to a corresponding diesel odour. The diesel can reach the road and as a result friction between the tyres and road surface may be decreased.

Fix: Check filter and replace as necessary.

Recalled models: CLS · 22,298 vehicles

Power steering assistance may be lost due to an implausible signal occurring in the control unit. The mechanical steering of the vehicle is maintained but greater input from the driver will be required. When the fault occurs warning will be delivered both visually on the vehicle display and audibly via a signal tone.

Fix: Recall the vehicles that are likely to be affected to replace the electric power steering units.

Recalled models: CLS · 316 vehicles

It is possible that due to a faulty electrical connection and high air temperature only the first stage of the air-bag will only ignite and the second stage will not. This could result in the non-deployment or full deployment of the passenger air-bag. If the vehicle is involved in a serious collision it is possible that the passenger may receive increased head injuries.

Fix: Recall all the affected vehicles and replace the passenger air-bag.

Recalled models: CLS · 1,279 vehicles

The electrical connection in the interior of the crankshaft sensor's chip housing may be interrupted which may result in loss of power and the inability to restart engine

Fix: Recall affected vehicles and replace crankshaft sensor

Recalled models: CLS · 19,331 vehicles

In isolated cases it is possible for vibrations within the vehicle to in turn vibrate the wiring harness connected to the Sensotronic Brake Control unit. This causes the internal contacts within the unit to suffer abrasion and subsequent resistance increase. The resultant affect is that more effort will be required on the brake pedal to stop the vehicle.

Fix: Recall the vehicles that are likely to be affected and mount an additional bracket to the electrical harness to prevent relative movement.

Recalled models: CLS · 58,022 vehicles