Jump-starting, towing and tow-starting
Jump-starting
If the vehicle batteries are discharged, a second vehicle can be used to jump-start the vehicle.
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When batteries are being charged, explosive detonating gas is emitted. When working on batteries, always make sure that the work area is well ventilated.
Keep flames and naked lights away from the battery, and do not smoke.
Avoid making sparks (e.g. when disconnecting the batteries). Sparks can ignite the oxyhydrogen gas and cause the batteries to explode. You and others could be seriously injured.
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| Risk of injury |
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Due to the gases which escape from batteries, there is a risk of acid burns when jump-starting a vehicle. Do not lean over the battery while the engine is being jump-started.
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| Risk of explosion |
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There is a risk of minor explosions being caused by gas escaping from the batteries during the jump-starting procedure. Avoid producing sparks. Do not allow naked flames near batteries and do not smoke.
Observe the instructions relevant to safety and protective measures when handling the battery. They can be found in the index under the "Battery" entry.
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Do not use a battery quick-charge unit for jump-starting.
Discharged batteries can freeze at temperatures below -10 °C. Do not start the engine in these circumstances. First, thaw out the battery. Only have the vehicle jump-started by:
Use a jump lead protected against polarity reversal with a conductor cross-section of approx. 35-50 mm2 and insulated terminal clamps.
Pull out the mains plug before starting from a mobile charging station (batteries with a mains power supply unit). Overvoltage can damage the electronic components in the vehicle.
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Make sure that the vehicles are not touching.
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Turn the vehicle key fully back in the ignition lock.
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Switch off all electrical consumers.
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Take off the battery cover.
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Connect the positive terminals first and then the negative terminals of the batteries with the jump leads.
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Donor vehicle:
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Run the engine at a fairly high speed.
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Vehicle being jump-started:
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Turn the vehicle key to the drive position in the ignition lock.
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Start the engine and allow it to idle.
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When the jump leads are removed, the engine of the slave vehicle should only be running at idling speed.
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Disconnect the jump leads, first from the negative terminals and then from the positive terminals.
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Have the batteries checked at a qualified specialist workshop, e.g. a Mercedes‑Benz Service Centre.
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 | Environmental note |
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Batteries contain lead. Do not dispose of used batteries with the household rubbish.
Dispose of old batteries in an environmentally-responsible manner.
Take faulty batteries to a Mercedes-Benz Service Centre or a collection point for used batteries.
Transport and store full batteries in an upright position. Secure batteries against tipping over during transport.
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Manoeuvring/tow-starting and towing away
The front coupling jaw is intended for manoeuvring, tow starting and towing away.
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If the vehicle has to be carried
on a low-loader (e.g. after an accident), the maximum permissible vehicle
height of 4 metres could be exceeded. Drive carefully and anticipate road and
traffic conditions. Observe the maximum headroom of underpasses, otherwise you
could cause an accident.
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| Risk of accident |
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If you have the vehicle towed with the engine not running, power-steering assistance will not be available.
You will then have to use considerably more effort to steer the vehicle and you could veer off the road in bends or collide with the towing vehicle.
Agree on a clear system of signs with the driver of the towing vehicle before towing and make sure that you and the driver of the towing vehicle adapt your driving styles in accordance with the difficult conditions.
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When the engine is not running:
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and the vehicle is being towed, there is a risk of transmission damage. The transmission is not lubricated. Observe the “Towing vehicles with engine damage” section.
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the brake system and gearshift are without compressed-air supply.
Therefore, make sure the engine is running while the vehicle is being towed, or make sure the compressed air is supplied by the towing vehicle.
If the compressed-air system cannot be charged, release the spring-loaded parking brake manually.
Vehicles with Telligent® gearshift / automatic gearshift:
If the vehicle’s electrical power supply and / or compressed-air supply has failed, remove the propeller shaft for the front and rear axle before the vehicle is towed.
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Attaching the towbar
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Release coupling pin  , pivot it approximately 90° to the front and pull it out upwards.
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Insert the rigid towing bar and reinsert and lock the coupling pin.
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Tow-starting the vehicle
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Turn the vehicle key to the drive position in the ignition lock.
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Vehicles with Telligent® gearshift: depress the clutch pedal.
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Vehicles with Telligent® gearshift/automatic gearshift: engage the gear. The gear engaged must appear in the display.
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Tow-start the vehicle.
Do not exceed a towing speed of 15 km/h.
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When the maximum permissible towing speed has been reached:
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Vehicles with Telligent® gearshift: release the clutch pedal and depress the accelerator pedal.
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Vehicles with Telligent® automatic gearshift: depress the accelerator pedal.
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Immediately after the engine has started:
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Vehicles with Telligent® gearshift: depress the clutch pedal and switch the transmission to neutral position.
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Vehicles with Telligent® automatic gearshift: switch the transmission to neutral position.
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Vehicles with Telligent® automatic gearshift:
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Towing the vehicle
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Turn the vehicle key to the drive position in the ignition lock.
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Towing vehicles with engine damage
| Risk of accident |
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If the vehicle has to be carried
on a low-loader (e.g. after an accident), the maximum permissible vehicle
height of 4 metres could be exceeded. Drive carefully and anticipate road and
traffic conditions. Observe the maximum headroom of underpasses, otherwise you
could cause an accident.
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Load the vehicle onto a low-loader.
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Towing vehicles with transmission, transfer case or axle damage
Original Element p durch Gültigkeiten gefiltert!
| Risk of accident |
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If the vehicle has to be carried
on a low-loader (e.g. after an accident), the maximum permissible vehicle
height of 4 metres could be exceeded. Drive carefully and anticipate road and
traffic conditions. Observe the maximum headroom of underpasses, otherwise you
could cause an accident.
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Load the vehicle onto a low-loader.
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Towing a vehicle with operational gearshift
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Towing speed of maximum 40 km/h.
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Turn the vehicle key to the drive position in the ignition lock.
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Shift the transmission to neutral.
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Switch the gearshift linkage to the fast range more.
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Towing a vehicle with total failure of the gearshift
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Switch the gearshift linkage to the fast range more.
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Switch the transmission to neutral position by means of the mechanical emergency gearshift more.
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Towing a vehicle with operational emergency gearshift
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Towing speed of maximum 40 km/h.
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Set the emergency gearshift to NH on the shift lever unit more.
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In the event of axle damage
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ARKI Themenmodule "Vorsicht" nicht gefunden!
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| Risk of accident |
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If the vehicle has to be carried
on a low-loader (e.g. after an accident), the maximum permissible vehicle
height of 4 metres could be exceeded. Drive carefully and anticipate road and
traffic conditions. Observe the maximum headroom of underpasses, otherwise you
could cause an accident.
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Load the vehicle onto a low-loader.
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