1997 MERCEDES-BENZ ML350 Complete Repair Manual

ignition winter tires TPMS timing belt recommended oil wheel bolts

Page 3169 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual provide reliable cooling system protection. In special cases (commercial-vehicle engines, no antifreeze
specification) coolant additives can be used that are primarily corrosion protection additives.

provide reliable cooling system protection. In special cases (commercial-vehicle engines, no antifreeze
specification) coolant additives can be used that are primarily corrosion protection additives. In this case
item 2.3 is valid.
As an exception, if neither anticorrosion/antifreeze agent conforming to Sheet 325.0 nor coolant additives
without addition of antifreeze conforming to Sheet 312.0 are available, proceed according to point 2.4
(exception: OM 500 and OM 900). The systems described under items 2.2/2.3/2.4 are not compatible
with each other. It is recommended to mix the entire coolant quantity outside the engine.
2.1 Anticorrosion/antifreeze agent for passenger-car engines
Alongside the correct constitution of the cooling water (point 1.2.2), care must be taken to ensure that
only anticorrosion/antifreeze agents as approved for all engines in accordance with Sheet 325.0 are used.
These products serve to guarantee that, in particular, an effective protection against corrosion is provided
for all light-alloy parts in the cooling system and they are also specified for all passenger-car engines.
In order to ensure that the protection against corrosion is effective, the anticorrosion/antifreeze agent must
remain in the cooling system throughout the year - including when in tropical climates - and regardless of
the operating conditions. In countries with high outside temperatures this is also important in terms of
raising the boiling point.
In the event that these regulations are not observed the cooling system may suffer from damage by
corrosion. As a consequence of corrosion deposits there is a danger that ducts in the radiators (engine
overheating) and heat exchangers (poor heat output) get plugged up thus causing damage to the engine.
As a result of the optimizations we have carried out on the system of engine/coolant/cooling system, in
the majority of our newer passenger cars, a replacement of coolant is not necessary until reaching 15
operating years or 250,000 km (whichever comes first). This may not apply to some models; in these
cases the maintenance booklet will stipulate another regulation.
2.2 Anticorrosion/antifreeze agent for commercial-vehicle engines (normal case)
(not: BR 600, BR 100 and BR 200)
The coolant in commercial-vehicle engines is made up of both water and anticorrosion/antifreeze agent
(refer to item 1.1.1) and as such offers ideal protection against corrosion and cavitation.
All the approved products on the Sheets 325.2, 325.3 or 325.0 which are part of the Specifications for
Operating Fluids can be used to select an anticorrosion/antifreeze agent. However, it should be noted that
passenger vehicle engines built into commercial vehicles must be filled like passenger vehicles (e.g. OM
601 in T1), i.e. a product conforming to Sheet 325.0 and 326.0 must be used.
Products that are not listed in Sheets 325.0 and 326.0, or 325.2 and 326.2, or 325.3 and 326.3 are not
approved and are therefore not to be used under any circumstances.
Anticorrosion/antifreeze agents or coolants conforming to Sheet 325.3 or 326.3 may be used for
longer than other products due to their composition. The change interval is set at 5 years (refer to

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MERCEDES-BENZ ML350 1997 Complete Repair Manual Overview Section 5). However, it should always be remembered that anticorrosion/antifreeze
a
gents or coolants conforming to Sheet 325.3 and 326.3 must not be mixed with those conforming to
Sheet 32

Overview Section 5). However, it should always be remembered that anticorrosion/antifreeze
a
gents or coolants conforming to Sheet 325.3 and 326.3 must not be mixed with those conforming to
Sheet 325.0 or 326.0 or 325.2 and 326.2.
2.3 Coolant additives for commercial-vehicle en
gines without antifreeze specifications (refer to item
1.1.2) (not: BR 600, BR 100 and BR 200)
In those application cases where no antifreeze is necessary, coolant for commercial-vehicle engines as
under item 1.1.2 can be mixed to suit. It is impossible to cite generalized mixing proportions because the
application concentrations of products included in Sheet 312.0 may be different. If the tolerances exceed
or fall below those given in Sheet 312.0, then appropriate adjustments must be made. The coolant's
boiling point is only insignificantly increased by these additives. The starting-off water underlies the
more stringent regulations as under point 1.2.3. The usage period for this coolant is shorter than usual (see
position 3). If it is necessary to refill, the same product must be used and at the same concentration level.
The blending of different products is not permitted as stated in Sheet 312.0.
2.4 Coolant regulations for commercial vehicle engines (exception, not for engines OM 500, OM
900, OM 457 and OM 460)
In the event that neither an approved anticorrosion/antifreeze agent is available, nor a coolant additive in
accordance with sheet 312.0 and if temperatures do not drop below freezing then it is possible in this
exceptional case to use a coolant refining agent to 1 vol % if it is approved in sheet 311.0 (soluble
corrosion protection oil). This will not raise the boiling point. The starting-off water itself underlies the
more stringent regulations as under point 1.2.3.
The period of usage for this coolant, which may only be used in exceptional circumstances, is shorter than
usual (refer to position 3).
Water that is too hard may impair the emulsion resistance, with the result that the emulsion
breaks down (oil separation) and the engine's water jackets are contaminated.
2.4.1 Applying water refining mixture
When carrying out a new filling (initial filling or filling after a cleansing operation) an emulsion of 1.0-
1.5 vol % should be used. When refilling, an emulsion of 0.5-1.0 vol % should be used. Concentrations
that are too high (>1.5 vol %) do not improve the corrosion protection capability and may exert a negative
influence on seals and hoses.
3.Monitoring coolant operation
It is very important to monitor the coolant constantly if the engine is to run trouble free.
The concentration level should be checked every six months.
The inspection should be conducted with suitable apparatus. If, when monitoring the concentration of the
coolant, it is determined that the concentration of anticorrosion/antifreeze agent has reached 40 vol.% or
less or an antifreeze protection of -28°C is no lon
ger guaranteed, the concentration must be increased to

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Page 3171 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual the regulation filling of 50 vol.% (-37°C). When topping up (after coolant loss), an anticorrosion/
antifreeze agent content in the coolant of at least 50 vol. % (antifreeze protection down to -37°

the regulation filling of 50 vol.% (-37°C). When topping up (after coolant loss), an anticorrosion/
antifreeze agent content in the coolant of at least 50 vol. % (antifreeze protection down to -37°C) must be
ensured, or the concentration regulations according to point 2.3/2.4.1 must be observed. In closing an
example is given in Overview Section 5.
Non observance a observance of these regulations or the use of non-approved products will
result in serious damage.
The corrosion inhibitors diminish during operation and lose their protective capability. Coolant that is too
old, and has lost its important inhibitors and anti-aging additives, becomes strongly corrosive. The
coolant additives as under Sheets 311.0 and 312.0 will also age. This causes a deterioration in the level of
protection capability, and with regard to coolant refining agents this will also cause the emulsion to break
down.
For this reason it is important to replace the coolant, in order to ensure that its corrosion protection
capability is retained. If necessary the cooling system should be thoroughly cleansed before refilling with
the new coolant. A sufficient level of heat dissipation will only be given if the cooler surfaces are clean.
The maximum permissible period of usage for coolant is cited in Overview Section 5.
The use of approved operatin
g fluids, which naturally include the anticorrosion/antifreeze agents, is
a well-known constituent of the warranty conditions.
4.Disposal of coolants
The coolants are biologically-degradable material.
All statutory regulations or waste water regulations in each individual country with regard to the disposal
of used coolant must be observed.
It is recommended to have the possibilities available for disposing of materials explained by the local
responsible water authorities.
Currently in Germany methods are being compiled for the purification of used coolant. The separate
collection of all used operating fluids is highly recommended.
However, as a consequence of the complex tasks asked of a modern coolant, it is on no account advisable
to use an improperly "recycled" coolant, which has only undergone a mechanical pre-purification process
5.Overview
Which coolant additive, what change interval for which engines?
Passenger cars engines
Sheet No.Engine seriesChange interval
years/km
M100/M200OM600

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Page 3172 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual Commercial vehicles engines
Calculation of the antifreeze quantity to be refilled with a concentration that is too low (specified: 50 vol.
%)
Fig. 645: Calculation Of Antifreeze Quantity
- (1 Of

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MERCEDES-BENZ ML350 1997 Complete Repair Manual Fig. 646: Calculation Of Antifreeze Quantity - (2 Of 2)
Refrigerant protection/concentration table (approx.)
ANTICORROSION/ANTIFREEZE AGENTS (SHEET 325.0) - BB00.40-P-0325-00A
Passenger vehicles an

Page 3174 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual ESA Antifreeze G48ESA, Burgdorf, Switzerland
Eurol AfrostinEurol Produktionsges.m.b.H, Ried im Innkreis,
Austria
EuroPeak Coolant/AntifreezeOld World Industries, Inc., Northbrook, IL 60062,
USA
EVOX

ESA Antifreeze G48ESA, Burgdorf, Switzerland
Eurol AfrostinEurol Produktionsges.m.b.H, Ried im Innkreis,
Austria
EuroPeak Coolant/AntifreezeOld World Industries, Inc., Northbrook, IL 60062,
USA
EVOX Extra G48 Antifreeze concentrateMOL-LUB Ltd., Almasfuzito, Hungary
Fridex G 48Velvana, a.s., Velvary, Czech Republic
Fuchs Fricofin antifreezeFuchs Petrolub AG, Mannheim, Germany
Genantin SuperClariant GmbH, Frankfurt/Main. Germany
Glacelf MDXTotal Lubrifiants, Paris la Defense Cedex, France
GlycoShellShell International Petroleum Co., London, England
GlycoShell NShell International Petroleum Co., London, England
Glysantin Anti KorrosionBASF AG, Ludwigshafen. Germany
Glysantin G 48BASF AG, Ludwigshafen. Germany
Glysantin mit Protect PlusBASF AG, Ludwigshafen. Germany
Hightec Antifreeze ANROWE Mineralolwerk GmbH, Bubenheim,
Germany
INA Antifriz Al SuperMaziva - Zagreb d.o.o., Zagreb/Croatia
Krafft Refrigerant ACU 2300Krafft S.A., Andoain (Guipuzcoa), Spain
MB 325.0 anticorrosion/ antifreeze agents 000 989
08 25DaimlerChrysler AG, Stuttgart, Germany
MB 325.0 anticorrosion/antifreeze agent 000 989 21
25DaimlerChrysler AG, Stuttgart, Germany
Mobil GS 333 ExtraExxon Mobil Corporation, Fairfax, Virginia, USA
Motorex Antifreeze G05Bucher AG Langenthal, Langenthal/Switzerland
Motorex Antifreeze Protect G48Bucher AG Langenthal, Langenthal/Switzerland
OMV KuhlerfrostschutzOMV Refining & Marketing GmbH, Vienna,
Austria
Panolin Anti-Frost MT-325Panolin AG, Madetswil, Switzerland
Permant 100Oil Refinery Modrica, Modrica, Bosnia-
Herzegovina
PO ozel AntifrizPetrol Ofisi Anonim Sirketi, Istanbul, Turkey
Powercooling Concentrate AntifreezeSMB, Passy, France
Procar Kuhlerschutz ExtraHunold Schmierstoffe GmbH, Eching, Germany
Sasol FreezolSasol Oil (Pty) Ltd, Randburg, South Africa
Shell Tri GuardShell South Africa, Cape Town, South Africa
Total Antifreeze and Summer CoolantTotal Lubrifiants, Paris la Defense Cedex, France
Valvoline AntiFreeze ExtraThe Valvoline Company, Lexington, KY/USA
York 716Ginouves Georges S.A., La Farleade, France
Zerex G 05The Valvoline Company, Lexington, KY/USA
Zerex G 48The Valvoline Company, Lexington, KY/USA

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Page 3175 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual GENERAL BRAKE FLUID - BB00.40-P-0330-01A
These specifications are valid for the Mercedes-Benz and smart brands.
General
The brake fluid in the brake system and in the hydraulic clutch operating sy

GENERAL BRAKE FLUID - BB00.40-P-0330-01A
These specifications are valid for the Mercedes-Benz and smart brands.
General
The brake fluid in the brake system and in the hydraulic clutch operating system fulfills hydraulic tasks. Due to
the high heat build-up during braking, these tasks can only be fulfilled by brake fluids which comply with all of
today's technical requirements in terms of their various properties (viscosity-temperature-characteristic, boiling
point, corrosion protection, oxidation resistance, etc.).
The most important properties which a brake fluid must exhibit are:
High boiling point, to ensure that the brake fluid does not form vapor locks at high temperatures. Vapor
locks reduce the operating pressure and thus the braking effect and may ultimately lead to brake failure.
The boiling point should remain as constant as possible throughout the duration of use of the coolant and
not drop under varying atmospheric influences or operating conditions (pressure, temperature), i.e. the
"wet boiling point" should be as high as possible.
Low compressibility, in particular at high temperatures.
The low-temperature characteristic of the fluid - even when at 40°C - must permit operation, i.e.
primarily, the viscosity must not become too high in the cold.
Compatibility with the materials used in the brake units and clutch operating systems, e.g. the rubber
boots or any other seal materials (elastomers) included in the brake components may only swell to a
controlled extent, any shrinkage must be avoided.
Sufficient corrosion protection for all metals present in the brake system.
The brake fluids released for use in MB vehicle models are listed on Sheet 331.0. These brake fluids not only
comply with our requirements, but also those of the US safety specifications FMVSS 116, DOT 4. The released
"DOT 4 plus" brake fluids (internal designation) are more advanced DOT 4 brake fluids with higher wet boiling
point, standard change interval: 2 years. In order to be able to comply with this useful period without any
problem, we strongly advise the use of released products as per Sheet 331.0, during the warranty phase this is a
precondition for any acceptance of customer claims.
The brake fluid listed on Sheet 331.1 "DOT 4 Type 200" is released for special applications in the UNIMOG
range with more stringent thermal requirements. For this type of use, a brake fluid change interval of 1 year
must be adhered to.
Handling brake fluid
Brake fluid based on polyhydric alcohols in oligomer or polymer form and/or their
Esters are hygroscopic and thus absorbs moisture from the air. Water, however, reduces the boiling point of the
brake fluid, whereby the danger of vapor lock formation is present. Therefore it should be noted that brake fluid
is always stored in sealed vessels. Brake fluid that has been stored unsealed can absorb so much moisture in a
few hours that it is rendered unusable.

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Page 3176 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual Because the brake fluid also absorbs moisture through the vent bore on the expansion reservoir, the wheel brake
cylinder and the brake hoses, the brake fluid has to be changed for safety reasons at r

Because the brake fluid also absorbs moisture through the vent bore on the expansion reservoir, the wheel brake
cylinder and the brake hoses, the brake fluid has to be changed for safety reasons at regular intervals, best done
in the spring. When performing this change, make sure that the old fluid is also drained off the clutch system.
Generally, it is vital for the brake/clutch system to be completely drained before being filled with new fluid!
For the above-mentioned reasons, used brake fluid must not be used again.
The brake fluid is amber in color and thus can be easily confused with mineral products.
Therefore, brake fluids should always only be taken from original containers and stored separately from other
mineral oils and fluids.
When performing maintenance operations and repairs on brake parts, make sure that fuel, mineral oil, grease or
suchlike do not enter the brake system. Hydrocarbon-based materials will lead to swelling of the elastomers in
the brake and clutch system and - even in low concentrations - will suffice to cause total failure of the systems.
Only new brake fluid may be used as a rinsing and cleaning agent for the cylinders, lines and the expansion
reservoir of the hydraulic brake system.
Experience shows that before handling brake fluid, the hands must be cleaned and any oil and grease removed.
Brake fluid acts aggressively towards paint and color. In the event of any brake fluid spills or splashes, it must
be rinsed away immediately using copious amounts of water (do not rub it away).
Brake fluid disposal
When disposing of brake fluid, the relevant national specifications must be observed. It is advisable to try to
have the brake fluid disposed of as economic good; this is contingent on
Strict separation of used brake fluid from other materials;
Presence of a disposal channel, which justifies its classification as an economic good, i.e. a proper
alternate usage must be assured.
If this procedure is not possible, used brake fluid is to be disposed of together with any, e.g. paint residue,
solvents and suchlike. Any adding of used oil must be avoided, as it will result in difficulties, if the used oil is to
be recycled; in several countries this is prohibited by the legislators.
MISCELLANEOUS NOTES
NOTES ON SCRAPPING GAS-FILLED HYDRAULIC COMPONENTS - OS00.00-P-1000-01A
all
Unusable gas pressure dampers, spring accumulators, pressure reservoirs and impact absorbers have to be
depressurized before being scrapped according to the respective valid accident prevention regulations. These
safety measures are necessary because gas pressurized hydraulic parts can explode if heat is applied. A risk of
explosion is
given, e.g. when scrapping with cutting torches, smelting or if gas pressurized parts in landfills start

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