Mercedes of the S-class W202

1993-2000 of release

Repair and operation of the car

Mercedes W202
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Lubrication system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. System of ignition
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
- 14. Electric equipment
   14.1.2. Measuring devices
   14.1.3. Technology of measurements
   14.1.4. Checks of electric equipment
   14.1.5. Sound signal
   14.1.6. Replacements of safety locks
   + 14.1.7. Rechargeable battery
   + 14.1.8. Generator
   + 14.1.9. Starter
   14.1.10. Traction relay
   + 14.1.11. System of lighting
   14.1.12. Devices
   14.1.13. Dashboard
   14.1.14. Glow lamps on the dashboard
   14.1.15. Light switch
   14.1.16. Radio receiver
   + 14.1.17. Antenna
   14.1.18. Loudspeakers
   + 14.1.19. Rubber brushes of screen wipers
   14.1.20. Windscreen washer jets
   14.1.21. The washing nozzles of headlights
   14.1.22. Screen wiper and its engine
   14.1.23. Protect the car
   14.1.24. Anticreeping "immunodeficiency"
   14.1.25. Why headlights grow dull
   14.1.26. Galogenka
+ 14.2. Electrical circuitries

14.1.24. Anticreeping "immunodeficiency"


The blocking is more passive, the better

From stealing there is no immunity. If the car can put the price, it potentially is goods, so – and object of stealing. What can be stolen, will be stolen. Question only where and when.

Electronic systems – the security alarm system and anti-theft devices remain the most perfect security measure. A problem of the first – to notify on attempt of stealing and to make psychological impact on the thief. But what from it I pound if the car costs on the street, and the bedroom fronts to the yard?! Even in time worked, it does not cause anything in passersby, except irritation. The thief "hvylyutsya not strongly too, knowing well that only the toy pistol worked. For now the owner puts on sports pants and will go down on the elevator, it is possible to manage to reach also the Canadian border. Therefore the alarm systems of the American type so popular in the CIS, in Europe are not used. At false operation the owner should pay all departures on the scene of police squad. Fortunately (in this sense), our militia on howl sirens of the car reacts extremely seldom. On its call only the owner forced to be convinced at first that alarm not false and only then to call the militia runs. And waiting for it – to try to beat off the car. Protivougonki much more effective, more difficult also is dearer at the same time.

Abroad the best advertizing of security system is recognition of insurance companies by its association. Otherwise you should not be put on the market with it. And what did not go at "them", now captivated our market. We have no similar association therefore insurance companies are forced to conduct examination independently.

Let's generalize some of the made demands – we will allocate the main components of systems on degree of protection and we will estimate their efficiency.

Systems of the admission in salon and start of the engine


Betray the owner if got into strange hands. The Tlris system locks which appeared recently – not an exception. Let's remind, there in a key the coded chip without power supply, in the lock, respectively, the reader (radio reader) which is periodically requesting a key is built in. If the microchip is identified, the system switches-off the alarm system and will unblock the engine. Alas, Tlris protects only from master keys and counterfeit keys.

DU charm

Are used infrared, radio - or ultrasonic communication. It is convenient, but can also betray. And if the battery sat down, then creates one problems: neither to put the car on protection, nor to remove from it, nor to unblock the engine. And, at the most inappropriate moment. And many were already car thieves of own car.

The system refuses if the director of hindrances – the broadband generator of noise or to it the similar device is nearby included. And – scanners, grabbers, etc. it is already not much less means of opening, than systems.

Card or charm of Tlris

The thing is even more convenient. While is in an area of coverage of the reader, automatically confirms the right for start of the engine and driving. If touch is lost (the driver with a card left the car), the engine is automatically killed. Does not distract the user and provides the highest comfort. But, as well as other material carriers of the password, unauthorized access allows, having got to the thief.

Attempt to receive a comfort maximum, having used several Tlris carriers, results often in result opposite – to their conflict at the next reading and operation of protection.

Type-setting password

In secret services this type of the admission is considered the most protected. There are two inconveniences – it is necessary to remember the password and to enter it. But cars with similar systems of the admission keep up much less often. And it is not more difficult to enter the password, than to dial phone number. For this reason many already begin to combine system from the inexpensive alarm system and a protivougonka with a set of the password for the admission. And manufacturing firms managed to adjust their release quickly. In modern prestigious cars this mode is included in the program of the regular on-board computer.

The systems demanding to enter the password after start of the engine

Otherwise the engine will be killed at the first braking or decrease in turns. In it their main shortcoming is also covered – do not reduce speed and steal. The second minus – the simplified password as it needs to be entered into time of the movement.

The combined systems of the admission

For example, a radio charm or the Tlris card for external protection and the admission according to the password for start of the engine. The steadiest system on degree of protection.

Alarm system (sound, light and radio pager)

Two levels of the alarm system – warning and disturbing are applied. Disturbing has to join if did not react to warning. Joining without cause, it only irritates and soon ceases to draw attention. Thieves often use it, specially disturbing the chosen car. Sometimes use monotony of voices of sirens – near the chosen car put the with the same siren and periodically include. When the owner ceased to react, from "training" pass to actions. Therefore take care that sounding of your alarm system differed from others. Or buy a radio pager.

He without excess noise will quickly tell you what happens to the car. Some connect the relay including a lighting lamp the parking lot to a pager and such reception imitate vigilant observation. But consider that the pager also easily is suppressed with the director of hindrances and there is always a chance to get up with pleasure slept in the morning, but a little impoverished.

Systems of blocking of start of the engine or its compulsory switching off

Foreign insurance companies demand that the anti-theft device provided blocking not less than three knots: starter, ignition and fuel feeding. And as a result – passive blocking of the engine if the processor does not work it (is disconnected or destroyed).

Active provides an immobilization only at the working processor. Besides to leave an opportunity to use the car at refusal of security system, in many of them the mode of normally closed contacts of the blocking relays is applied. Car thieves also use it: it is enough to tear off a wire of power supply of the main block – and all system is neutralized. To find it even among identical on thickness and color a wire, there will be enough bulb with the sharp probe. Isolation of a wire is punctured, is remained energized at the switched-off ignition and the direction of further actions is clear even to the poor student.

If wires from the blocked chains meet to one block, the car thief it only facilitates a task. The decision takes a couple of minutes. Here again advantage behind passive blocking, especially if is microimmobilizers and they are scattered on all car. And the more so if they are built in in regular blocks of the car as at the same time it is simply impossible to neutralize them a crossing point.

In the systems providing compulsory muffling of the engine the alarm system warning that to the car there is something wrong has to work and it is necessary to steer clear of it. Otherwise there is a chance to return the car which was injured not so much by the car thief, how many by involuntary neighbors in the route.

Systems of return of the car

It is about suppression of thuggish stealing. At it it is more reasonable to allow the car thief to drive off and at a distance, safe for you, forcibly to switch off the engine. The mode usually joins from a special charm. But his car thieves, most likely, will select, and at the movement will try not to reduce engine turns. As similar systems switch off the engine at decrease in turns below a certain level too. Or apply the director of hindrances then need to take away a charm will disappear.

And it is even more probable – will roll you in the car, will not reveal all traps yet. Then everything will suggest to disconnect them, to train to do it and only after that will turn out. Here then there will practically be no chance left of return of the car.

More precisely, so was until recently. There were systems allowing to block a call by phone the engine on removal in tens of kilometers. We learned about one of them recently, when receiving a pager of LINK telecom network. In the list of the enclosed services also "the peydzhingvy security autoalarm system" appeared. The more deeply we penetrated into a system essence, the more she interested us. To avoid charges of advertizing, we will not begin to provide its name, we will list only the elements which seemed to us by Ace of Base ("an ace in a pack").

It is the specialized on-board computer on the basis of the Intel processor trained to protect the car. The system is constructed on the microimmobilizers placed near or in subject to control. Them can be to eight independent. It is possible to include any reasonable quantity of signaling devices and sensors in it. Management of system and input of passwords of the admission are made manually from the two-push-button keyboard. Indication of states, confirmation of performance of operations and some hints are made by the multi-color indicator and musical signals. Perhaps expeditious reprogramming for changes of an algorithm of work of system. Kompter is protected from influence by an electroshock or from statement of a radio noise and remembers attempts of their application. Installation of the receiver of paging signals (Motorola) for reception of external teams is possible. The simplest of them – a sound pager: the processor on a radio command loses one of a set of easily recognizable melodies in salon. It is so possible to transfer to the driver conditional messages, without distracting from driving. The system price in the minimum configuration – about two hundred US dollars, with the receiver – is twice more.