I would like to tell me about regular maintenance for Mercedes E 230 1990 such like oil change ,Filters ..... ets

Routine maintenance items mainly include oil and oil filter, air filter , fuel filter and pollen filter replacement , spark plug maintenance / replacement , gearbox oil -related system checks and maintenance projects.
In addition, brake fluid, transmission fluid , battery , throttle , diagnostic tool , brakes and other components, when they belong in the regular maintenance of the test items , depending on usage Maintenance .

If you do regular maintenance on the engine and do regular oil changes there will be no regulatory period for the chain to be replaced unless it becomes noisy and is affecting the performance of the engine.

Hi,
You need a full PMS( Preventive Maintenance Service ).
Just tell the service advisor to do that PMS( checking all underchasis, steering,electrical, brakes,fluids,transmission, bolt & nuts retightening ), change oil, and check all filters.
That's all they should do for a warranty check up.

Hope Fixya helps you out!

MERCEDES BENZ MAINTENENCE SCHEDULE CALLS FOR OIL CHANGE EVERY 10K USING
SYNTHETIC OIL BUT I FEEL MORE COMFORTABLE CHANGING EVERY 5K.

Mercedes uses a service schedule with the letters A-H to denote the relevent maintenance recommended.A is the basic oil service and H is the most inclusive.The intermediate letters correspond to proportional services.The service light should be reset at the completion of the service.This can be done via interface or using the controls and menus on the steering wheel.The specific format for resetting is different for different years and models.Alldata is fairly accurate for reset guidelines,but is not correct on some.Make sure to use synthetic oil in all newer MB,especially with extended oil change intervals.

not 100% but an easy attempt is when you fill your tank up next, throw in some fuel injector cleaner, check the air filters as well, ah maybe since she's a caddy get her in for a good all round tune up, they'll check it all out and change all regular maintenance things like oil and air filters etc. I don't know if there's an Auto Value near you they do free diagnostic checks (plug in a computer and it tells you what's wrong and where the problem lies

if you have no lisghts on and the gaint is running well.. all you need is usual replacements:
- Engine Oil
- If Transmission filter was not changed in 90K, you should do it
- Oil & air filters
- driving (timing) belt
- if you feel so delay in start or power loss: replace spark plugs
- Check fluid levels in:
+ brake oil
+ Power Steering Oil

No such schedule.
spark plug every 30,000 miles
fuel filter/filter element every 60,000 or 4 years
brake fluid every 2 years
cooland every 3 years
oil changes between 14000 or more the FSS indicator on the dash will tell when need to be change

your answer will be in your owners manual

You have to reset it by holding the button on the dash that looks like odometer reset button then turn key on while holding that button that will reset that light.