20 Most Recent 2004 Mercedes-Benz CLK-Class - Page 7 Questions & Answers

I have answered this one a lot. it isn't terribly difficult to solve. There are 2 ways to go about this.

1. It is most often found in the original owner's manual where there will be a 4-5 digit code.
2. you can call the dealership and ask them they will want your VIN# and may even want you to verify that you are the owner of the vehicle.

Calling the dealership is your best bet, while your owners manual should have the procedure for resetting the radio the dealership can give you the procedure.

You could have a leak in the AC system ... if you just bought the car, the previous owner might have filled the Fre-on just before selling it to you, which would have hidden the problem. If this is the case, take it to a mechanic and they can probably find the problem.
Your compressor might not be compressing properly -- when you put the air on full-cold do you hear the compressor kick on? If not, it might be a bad compressor, or no coolant. Once again, this would require a mechanic to give you all the details
Your AC system might be in perfect shape, but out of coolant anyways. A mechanic should be able to fill it up for you in short order.
Unfortunately, if you are not experienced with working on cars, the AC system is not the safest to be working on on your own. It is highly pressurized when filled with coolant (which is a toxic substance) and without the right tools and experience, you could get severely hurt by loosening the wrong bolt at the wrong time. I highly recommend taking the car to a professional to reduce the risk to yourself.

Hi, you question is not clear enough to get an answer. You said you bought a 2001 what? What is the soft top you are also talking about? Please rephrase your question again.

If you're after radio code, you need to contact a Benz dealer and provide your VIN#. Dealer is only source for anti theft radio codes.

If you can open the hood, the battery can be charged from the hot terminal on the alternator or starter. The negative charger cable can just be attached to any bolt on the engine or any ground wire.

Turn the socket counter clockwise to remove it. Then the bulbs just pull out. You can get access to the bulb socket from the rear side.
Other types have two screws on the lens that you remove and then pull the bulbs out.

Changing the oil on your Mercedes is not that hard and will save you big money at the shop. You will need a special Mercedes oil filter wrench, as the filter is guarded by a housing that needs to be removed to get at the filter. The filter is located on the drivers side of the engine in the front. And no you dont need a topsider. Oil can be drained through a drain plug, but since the filter is located on the top of the motor a topsider is the easy way, since you wouldnt have to crawl under the car to get to the oil drain plug. The oil drain plug is located under the car at the bottom of oil pan. The filter can be purchased at any parts store and i would recommend a MANN filter. The filter is a cartridge that will come with O-rings that must be installed correctly and dont let the dealerships fool you, any good quality oil will be fine in your vehicle. But remember, if you ever go to a synthetic oil, you can not go back to a standard.

soft top roof modual under the near side seat needs a new one also there are 15 sensors you need to put it on a diognostics

unfortunately, this is a security measure added to most manufacture radios today

if you are lucky and the original paper work is in the glove box you should find the radio code there

otherwise, if you talk nicely to your local dealer and tell them how much you love your car and the factory radio, they may unlock it for you....Make sure you tell them you would HATE to replace it with an aftermarket radio, but if you have to pay $100 for the code that is what you are going to do.


Keep us posted and let us know if you have any luck at the dealer

You must be having a check engine light or maintenance coming up on the dashboard, if yes the best way to start troubleshooting this problem is to run a diagnostic test on the vehicle.Also after changing the mass air flow meter did you reset the ECM ?If not then this is required after any repair you do.Hope this helps.

Alarm system is detecting a fault. It could be a door latch sensor gone wrong, and it should show a door ajar light while driving, or the hood or trunk sensor disconnected. Most alarms are designed to "arm", even if it detects an open door.

The electric switch could be bad. Or there should be a relay somewhere in the back that is in between the switch and the latch that could be bad. You can test relays with an ohmmeter. The same with fuses. Have you tried to manually open the latch with a key? Can you hear the latch click when you push the button to release.

what country ?? if its in spain i can advise ,

ok guys here we go first let me started out by saying this.the orther nite i try opening up my top the window goes down and i hair a noise coming from the trunk, the next day i took the panels off from the trunk,man thats alot of screw youu got to take off to get to the pump area. the first thing i notice was the emty oil tank, so i add some jack oil to it, while going back up with every thing i broke the track but that was not a problem, there is a small switch at the rite side of the track, i took a small paper clip and short it closed and thats how l slvoed my problem.

Sir,
It can be fuse but you are also to check if the it motor of blower has have not burned or had any broken wire.

Hi,

Do not forget to accept the solution, if 100% satisfied with my solution.

Note - I can give you all details. Trust me it's more than enough. You are the best judge to determine, whether you need a repairman or you could do it yourself.

OPERATION

A variable three-wire resistor-type electrical sensor which sends a signal to the electronic control unit relative to the throttle position.

INSPECT

Different kinds of problems can happen with a throttle position sensor (TPS).

• The most common symptom of a bad or misadjusted TPS is hesitation or stumble during acceleration.
  • The fuel mixture leans out because the computer does not receive the right signal telling it to add fuel as the throttle opens.
  • Eventually, the oxygen sensor senses the problem and adjusts the mixture, but not before the engine stumbles.
  • On carburetor and TBI systems, fuel can migrate into the sensor.
• In cold weather a TPS gets cold and the feather (wiper arm) sometimes does not wipe against another metal strip.
  • If the strip wears away, momentary interruptions of the electrical signal can occur. These interruptions are called glitches.
  

A throttle position sensor has a wiper arm that rubs against a resistor strip.

• When the engine is under a heavy load, the air conditioning compressor is shut off by the computer. A bad TPS can shut off an air conditioning compressor.
• Also, on computer controlled cars, the key should be turned on before depressing the throttle or the computer can receive a faulty TPS reading and the car might not start.

TEST

The TPS can be checked with either a voltmeter or an ohmmeter.



A throttle position sensor can be checked with an ohmmeter or a voltmeter. The elongated slots in this TPS allow for adjustment. Courtesy of Ford Motor Company. To perform ohmmeter tests, the switch must be disconnected. That makes the voltmeter (or scope, which is actually a voltmeter, too) the tester of choice.
Three tests are made for TPS operation.

• Reference voltage must be present at the switch with the key on.
• The base voltage is also compared to specifications.
• Finally, voltage should change gradually and evenly as the throttle is opened and closed. If the voltage does not rise, or there are skips (glitches) in the voltage measurement, the sensor is bad.

A glitch in a DSO pattern on a TPS test. Courtesy of Edge Diagnostic Systems. When checking voltage output of a TPS, typically there would be less than 0.1 V at idle. Typical voltage at half throttle would be 2.5 V.
NOTE Remember, there is a 5-volt reference signal. That is why there is a 2.5 V signal when the throttle is half open. At WOT the signal would be 4.5 V. Voltmeter Testing
A sensor can be tested with a voltmeter while its electrical wiring is still connected (this is called backprobing a connector). Move the throttle slowly from closed to open. At different throttle openings, varying resistances are specified. Watch for any glitches.

• With the ignition switch on, connect a voltmeter between the reference wire to ground.
• Normally, the voltage reading should be approximately 5 volts.
  • If the reference wire is not supplying the specified voltage, check the voltage on this wire at the computer terminal.
  • If the voltage is within specifications at the computer, but low at the sensor, repair the reference wire.
  • When this voltage is low at the computer, check the voltage supply wires and ground wires on the computer.
  • If these wires are satisfactory, replace the computer.
• With the ignition switch on, connect the voltmeter from the sensor ground wire to the battery ground.
• If the voltage drop across this circuit exceeds specifications, repair the ground wire from the sensor to the computer.

NOTE When the throttle is opened gradually to check the throttle position sensor voltage signal, tap the sensor lightly and watch for fluctuations on the voltmeter pointer, indicating a defective sensor.

• With the ignition switch on, connect a voltmeter from the sensor signal wire to ground.
• Slowly open the throttle and observe the voltmeter.
• The voltmeter reading should increase smoothly and gradually.
• Typical TP sensor voltage readings would be 0.5 volt to 1 volt with the throttle in the idle position, and 4 to 5 volts at wide-open throttle.
• If the TP sensor does not have the specified voltage or if the voltage signal is erratic, replace the sensor.

Ohmmeter Testing
With the wiring disconnected, the TPS can be tested with an ohmmeter.

• Connect the scope to the sensor's output and a good ground and watch the trace as the throttle is opened and closed.
• The resulting trace should look smooth and clean, without any sharp breaks or spikes in the signal.

A normal TP sensor waveform while it opens and closes.

• A bad sensor will typically have a glitch (a downward spike) somewhere in the trace or will not have a smooth transition from high to low.

The waveform of a defective TP sensor. Notice the glitch while the throttle opens. These glitches are an indication of an open or short in the sensor. On some carbureted engines, an open in the TP sensor will show up as an upward spike. This is because the computer supplies a 5-volt signal to the sensor's output wire if the TP sensor has an open.

SERVICE


Some throttle position sensors are adjustable. Follow manufacturer's instructions.

• On older engines, correct adjustment is crucial to proper system operation.
• On newer engines, this is not as important because the computer uses whatever reading it takes at idle as base voltage (adaptive learn strategy).

Incorrect TP sensor adjustment may cause:

• Inaccurate idle speed,
• Engine stalling, and
• Acceleration stumbles.

Follow these steps to adjust a typical TP sensor:

• Backprobe the TP sensor signal wire and connect a voltmeter from this wire to ground.
• Turn on the ignition switch and observe the voltmeter reading with the throttle in the idle position.
• If the TP sensor does not provide the specified voltage, loosen the TP sensor mounting bolts and rotate the sensor housing until the specified voltage is indicated on the voltmeter.

A TP Sensor with elongated slots for sensor adjustments. Courtesy of General Motors Corporation - Chevrolet Motor Division.

• Hold the sensor in this position and tighten the mounting bolts to the specified torque.

Most throttle position sensors are made so that their adjustments are tamperproof. They have screws that are either soldered or staked.
To remove the switch, these might need to be drilled or filed off. After the new switch is installed and adjusted, the new mounting screws are restaked.

Let me know, if need further assistance.

Hope i helped you.

Thanks for using " Fixya ' and have a nice day!!