Mercedes S-class W202

1993-2000 of release

Repair and car operation



Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
- 14. An electric equipment
   14.1.2. Measuring devices
   14.1.3. Technics of measurements
   14.1.4. Electric equipment checks
   14.1.5. A sound signal
   14.1.6. Replacements of safety locks
   + 14.1.7. The storage battery
   + 14.1.8. The generator
   + 14.1.9. A starter
   14.1.10. The traction relay
   + 14.1.11. Illumination system
   14.1.12. Devices
   14.1.13. The instrument panel
   14.1.14. Lamps накаливания on the panel of devices
   14.1.15. Light switch
   14.1.16. A radio receiver
   + 14.1.17. The aerial
   14.1.18. Dynamics
   + 14.1.19. Rubber brushes of screen wipers
   14.1.20. Jets стеклоомывателя
   14.1.21. Washing atomizers of headlights
   14.1.22. A 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. "Галогенки"
+ 14.2. Electroschemes











14.1.25. Why headlights grow dull
THE GENERAL DATA

Or how to achieve the most effective illumination?

Let's talk about why in due course headlights start to give dim light, probably, and sufficient on deserted highway, but absolutely inefficient on recovered, especially, if the counter stream is great.

Sometimes sin on the generator and a pressure regulator, in it there is a true share: malfunctions of these devices are appreciable by "the movement" of a light stream as though submitting to quantity of turns of the engine. It is clear that unimportant work of the generator and a regulator напрядения influences not only on efficiency of headlights – the accumulator, or not receiving a high-grade charge first of all suffers, or opposite – receiving it is a lot of it, from what the electrolit "boils". Headlights in this case play only an indicator role though superfluous pressure strongly reduces a resource of lamps. Constant dim radiation arises for other reasons: or strongly the reflector becomes soiled or becomes covered by corrosion, or the internal surface of a flask of a lamp becomes covered by dark touch.

If the durability of a reflector depends on many factors about which we еше will talk even quite serviceable lamp "types" a dark touch for any 30-50 thousand kilometres. Its efficiency in that case percent on 20 below the new.

The reflector "lives" longer. In modern cars the reflector and headlight glass are, so to say, an integrated whole that in the turn first, of course, provides the optimal light bunch, and in the second – tightness. The tightness lack promoted penetration in a headlight of a dust which then burnt on a reflector and reduced it всетоотдачу. The Same occurred and to a moisture, is active конденсирвоавшейся on a reflector that caused corrosion.

About five years ago with corrosion tried to struggle in any improbable way, filling in in a headlight a red brake liquid. The fashion on this, is faster harmful, rather than a useful invention has passed, but there was other extreme measure – плексиглазовые "points" on glasses. Besides, that such protection reduces светоотдачу, "smearing" a direction of beams, it вызвает strong heating and обгорание a reflector. By what in that case use from protected откамней glasses if the reflector – not clearly suffers, especially, as it has already been told, glass and a reflector nowadays represent an integrated whole? By the way, therefore it be no point to buy "lens" separately: good light from such headlight never to achieve.

At last, as to adjustments. Even the perfect headlights supplied галогенными with lamps, can appear on the journey useless if they are adjusted somehow. Not everyone, and not always has a possibility to make adjustment at the stand. Therefore rather quite good results give the old, well tested ways of "house" adjustment. The car establish on an equal platform, measure 30 metres and put on a mark, let us assume, a brick. One of the headlights, included on a passing light, something veil, and in the second – rotate adjusting screws so that light exposure border vertically to bring to the put brick. The same do and with other headlight. A headlight regulate in a horizontal direction, but already without a brick: here it is important to achieve, that bunches from both headlights did not fork and did not converge in the middle.