My 1995 Mercedes s 500 coupe will not start. All of the panel lights light up when the ignition is engaged but the engine will not turn. I have had the battery tested and it is okay.

Does it click or do anything? If not, then the plastic gears inside the ignition that control the vehicles ACC and ON positions along with the cranking may have slipped. Have someone to pull the ignition switch panel and check and make sure the "gears" are working properly.

1. Depress and hold the select/reset button on the right of the instrument panel beneath the odometer reading.
2.Insert the ignition key into the ignition to hold the select/reset button.
3.Turn the ignition key to the power accessory position. This will illuminate all the lights on the instrument panel without the engine running.
4.Continue the select/reset button until the maintenance required light goes out.On some year models. the light may blink once before going out.

Thanks for choosing FixYa and welcome. I am not too familiar with this vehicle, but most OBDII hookups are under the drivers side dash. There should be a port there to hook it up at.

Follow the top coolant hose to the engine block
The thermostat is inside the hosing.

Please wait unit the engine is cold before you work on it.
Have a catch pan,new thermostat /gasket/sealer and fresh coolant before starting the job.

need more information what's the your car sl 500 or s500 and also need to know what time it's happen when first acceleration light comes on or while drive car some time it's comes on, other thing would like to know every time ignition off and start is the asr light off? if you give more information can be solve your problem,

souns like the electrical part of the ignition swich is worn out. replace this swich under the ignitionkey and will be as before. good luck

put a timing light on any plug wire press the button or, turn on the timing light: if it flashes you have a good ignition circuit

sound like they damage your ignition wires .

grab both sides of cluster and just pull unit towards you. Nothing holds it in but 4 clips and 4 rubber grommets. Just dont yank too hard or youll pull wires off the back.

most probable cause could be a faulty ignition switch. Does the lights on the dash come on when you turn the key to the on position ? Do they turn off when you turn the car to the start and are about to crank the engine ? If that does not happen you will have to replace the Ignition switch. They don't have a fuse for the dash lights.