Bert Rowe’sAclass information A class Alternator

19 Мар 2015 | Author: | No comments yet »
Mercedes-Benz E 200 T S210

All modern cars are fitted alternators, normally driven by a which powers the generator power for all the electrically powered and for charging the battery, thereby the power drawn from the when for instance starting the car or the amount of power demanded by the components exceeds the amperage of the alternator.

This can be the case the car is for instance waiting at traffic junctions or any instance where the is not turning sufficiently to provide the required the battery will the short fall, the power replaced as soon as the engine is normally and where excess to the demand is available from the

This of course can only be efficiently if the battery is in good and contains water/acid covering the of the 6 cells of the 12volt battery.

It is known that where a car is in the winter months for only runs, the battery power will not be replaced fully the battery will require a charge from a battery from time to time my page13, battery charging.) is due to the fact that the alternator power all the various electrical which includes such as, lights, audio equipment, steering, heated seats, etc etc as of course the extras that the has fitted him/herself,

There is no that the alternator does a job and yet from a service point of is often forgotten until of it goes defective and packs up having done so the car eventually to start due to loss of stored power.

An indication that the alternator has producing power will be in the power steering on this as this provision requires a from the alternator circuit for the PSP to This is only the case is the alternator is rotating and generating

In the case of the ‘A class the is located on the back right side of the engine and is driven by the ‘v’ belt. were the car is with air conditioning the alternator is between the compressor and the rear of the casing, albeit is possible to the alternator without discharging the air system.

driving the alternator the poly ‘V’ Belt is providing the belt is inspected and as necessary, loose your and the car will not run for very long as all power is lost, due to the generator lost it is power souse. the poly ‘V’ belt

The red arrow is pointing to the alternator forward of in this case the air compressor.

An indication that the has ceased to generate power be given by the ignition light not out or flickering while the engine is and or the power steering pump(PSP) to work, for that reason check the alternator before a repair/replacement of the PSP.

Owners also bear in mind both the power steering electronics and the alternator are situated at not that 16 inches (400mm) the road surface, therefore if you flooding which appears to be more common consider the before entering the flooded surface or even ford, as damage may be caused to these although also applies to the air compressor it is less likely to any long term damage.

Replacement of the alternator

When with having to replace alternator always quote Vin number to the provider the information on site is in favour of the W168/A160 models are know to have alternators. some models for have water cooled which cost considerably money, please do not me why this is I cannot work out how hot water in the system can possibly cool an which is possibly why not all models them!

It should noted when testing the alternator at the power steering contacts junction box 13+volts will be if the alternator is working correctly.

As can be see by the on this alternator the amperage max is 90amps. if all the the bulbs and electrical on the amperage by each were up then it would be seen how amps were left for battery As can be see by the label on this the amperage max output is 90amps. if all the the and electrical components on the amperage by were added up then it be seen how many amps left for recharging battery

Only limited servicing can be on the alternator while in situ, In the of failure check the contacts for and cleanliness, ensure the ignition is off working on electrics or fault will be possibly stored on ECU.

However should the still not work, having it from the car the alternator can be stripped and repaired, brushes replaced I’m unsure if these can be from Mercedes Parts a good auto electrician be able to provide or indicate theses can be purchased.

As is the case with most fitted to the engine and car Mercedes-Benz do not them themselves, it is therefore shopping around for either a or new unit which may be cheaper Mercedes parts but check price first. some they are as, if not cheaper than outlets/suppliers.

Another tip from a owner Roy, he had what he was a noisy alternator, albeit When he investigated further it was the on the poly ‘V’ Belt pulley wheels that at fault the alternator was OK, so it is worth before spending out for a replacement and if not doing it yourself, ask you garage to do the

Roy has also highlighted the fact on the unit fitted to his car, the is fitted with an inertia system, i.e. when the car is switched off the armature of the generator continues to spin (turn) of the pulley wheel for a few moments the engine is switched off. is obviously designed to take the off the main shaft of the alternator is connected to the pulley wheel of the by a ratchet clutch system.

As a of interest my car 2002/A160 is fitted a ‘Valeo’ as was the other owners but do sure you get the right replacement or you could involve your in unnecessary cost.

I am aware for that at least some of the A170CDI were fitted water cooled alternators water cooled’, connected the cooling system.

How hot water in the cooling system of the car an alternator beats me, Well of it doesn’t In fact it’s the reverse. The alternator generates and well as electricity (DC) and as a heats the water in the cooling of the car. this in the case of is useful; because heaters in cars are not so efficient as petrol and so any heat that can be gleaned and to heat the car in the colder months is in case well used.

was the first time I had heard such a component existed, we often as ‘A’ class heard that the ‘A’ was built as a test bed. this could well be one case. So if you are looking at a replacement care to get the right unit Vin number should identify the unit when ordering.

is an alternator suitable for Mercedes-Benz fitted with fluid because of the coolant fluid to the water of the cars cooling we choose to use the word fluid i.e coolant mix)

This unit is apparently suitable

MERC — E-CLASS — E 200 CDI (210.007) 09/2000-03/2002

— E-CLASS (W210) E 200 CDI (210.007) 09/2000-03/2002

MERC E-CLASS (W210) — E 220 CDI 09/2000-03/2002

MERC — (W210) — E 270 CDI (210.016)

MERC — E-CLASS (S210) — E 220 T CDI (210.206)

MERC — E-CLASS (S210) — E 270 T CDI (210.216)

MERC — E-CLASS (S210) — E 320 T CDI (210.226)

MERC — S-CLASS — S 320 CDI (220.026, 220.126)

MERC — M-CLASS — ML 270 CDI (163.113) 12/1999-06/2005

My about the ‘A’ Class being a test bed for the fluid alternators appears to be out of order as models are already fitted fluid cooled units as

Mercedes-Benz E 200 T S210

However it does substantiate my about using you vehicles Vin to get the correct unit for your go to the car breakers and I feel that on component at least you will be your money, as the chances of the correct unit look slim.

When Roy a fellow had noise coming from the car in the alternator, poly ‘V’ area, he assumed the worst and the alternator however further revealed that the poly Belt tensioner pulley had dried out, which only be rectified by replacing new pulley wheels complete bearings,

He could have the bearing alone but opted to the pulley wheels as the working were also worn and Cost approx Ј20.00 (10/04/08) Always use your Vin to obtain the correct spares for car.

One example of a water / cooled alternator

Remember to your VIN the W168 A170CDI has a cooled alternator get the wrong for your car and you could get stuck it so check using your Vin purchase and paying out for postage or

As can be seen they vary not in appearance but cost as well are not interchangeable. SO USE YOUR VIN

I would like to thank Roy a owner, for some of the photographs on page.

Hello. We spoke a ago and I was asking about the whining that came out of my engine.I found a service that to work with my parts. So now I to buy a new alternator (I could not find a that could fix my old one). The is that when i wanted to buy the thay asked me How many does my old alternator have?. Now I ask you to help me.

These are the specifications for the 2 of alternator — 5 and 6 nervures Alternateur VALEO 436732

Engine code 166.940

[V] 14 V Charge curent (Amps) 90

Position/degrй 0 °

Direction of rotation

Poulies with poulie

for belt- Ш [mm] 51 mm

— VALEO 437806 [437806]

code 166.940

Voltage [V] 14 V

curent (Amps) 143 Amps

Mercedes-Benz E 200 T S210
Mercedes-Benz E 200 T S210
Mercedes-Benz E 200 T S210


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