zuzu_pali

Okay so i got my 2004 clk500 finally up and running .

i gave it a tune up , changed mas airflow sensor, changed spark plugs , sparkplug wires ,oil.

my friend reset the code for the mas airflow sensor with the snapon tool.

but after driving a while i get the p0104 code and some times when im driving esp comes on or a red batery signal saying visit workshop.

what can this problem be? he did a full scan and it did not show any other problems. they only codes i had was for the srs light and theirs alot for srs but no other engine codes or any other problems .

but whats going on? can it be the throttle body? some times the fan turns on high , some times the rpm is high on park.
need some help i really dont want to go to the dealer ! some one save me !

DanielFD

Sounds like a tired battery or a bad alternator. As usual i forget the exact voltages to look for if you want to test your battery.. Somebody will probably pop them in after me.

zuzu_pali

thanks for the reply . the battery is brand new duracel and the alternator is brand new but i dont think its bosch. but its just weird stuff i know its something simple but i need the knowledge from experts. but the rpms rev high on park, that can cause this as well?

BenzAMG99

Either check if there's any air leaking from the system or if the cruise control is stuck in place. That's what happened to me, the damn cruise control was stuck.

Rudeney

Regardless of the fact that you have a new battery and alternator, you still need to check the electrical system: 12.6v at rest, no less than 11v cranking, 14v at idle.

zuzu_pali

the cruise control leverage ?

zuzu_pali

hello brother , i checked the voltage with the car not starting . its jumping from 12.5 to 12.6

zuzu_pali

is their any tutorial on how to take out the throttle boddy? i replaced the crankshaft sensor before .

Rudeney

Check it with the engine running. It may take a minute, but it should eventually stabilize around 14v. I might even keep a voltmeter connected to see if it's fluctuating when you get the ESP and battery errors.

zuzu_pali

okay i will check it out. do you know the cause of the car turning of when im at a red light ? im going to check for leaks and make sure mas air sensor is tight on the throttle boddy. but the red display with the battery saying visit work shop ? can that be for any thing or just the battery ?

zuzu_pali

how do i check the votage ? can i see it on the cluster ? also why does the car turn of here and their for no reason. also got a pedal position sensor code . i have no idea whats going on

zuzu_pali

i have a new crankshaft position senson as well from Bosch, its just weird how the car turns off here and their for no reason. then the red battery sign comes on the cluster saying visit workshop

Rudeney

Your car may have a built-in voltmeter. It's on a "hidden" menu on the instrument cluster. With the key in position one, make sure the display is in the default mode - usually showing 0mph. Then press the rest stalk three times quickly. You should hear a beep and see a different menu in the display that will include a voltmeter. If not, then try buying an inexpensive voltmeter and tapping into the cigarette lighter.

zuzu_pali

ok thanks for the help i will check it out, sorry for bothering you but one more question . can a bad coil cause the car to die or turn of randomly ? and i have a brand new bosch and im still getting p0104 i just dont understand . but that coil thing is it possible ? because when i did my tune up i changed spark plugs and spark plug wires but not coils

BenzAMG99

Personally, I always change the coils when doing a tune up. Especially when changing the Spark

zuzu_pali

but can that cause the car to rpm high or the car to turn of if one of them are defective

BenzAMG99

I'm not sure about that, but I'm certainly sure it the engine would start to feel like it's rattling a lot.

Rudeney

P0104 is not a symptom of a coil problem - it's the MAF sensor. While this could cause the car to run poorly or even stall, it would not cause the battery/voltage error.

zuzu_pali

yeah i understand sir , i changed the maf sensor brand new bosch and the crank shaft sensor bosch new . and my car is turning of on me for no reason and it revs up high and low and high and low . i have no ideah how to fix this i want to throw money on the right thing. should i just take it to the dealer? i just have a feeling their really not going to fix it . can this be the ecu car computer? i just dont understand

irokdastar

The best thing to do is to find a good Shop that deals with mercedes. Do not go to mercedes they will charge you an arm and 2 legs and might not even fix it . It maybe an electrical issue . even though the alternator is new it might not be putting out the correct voltage . take it in and have them check everything . Its cheaper than guessing and throwing parts at it .

Rudeney

^+1 There is only so much we can help wit over The Internet. There is no substitute for a competent mechanic.

DanielFD

this does sound like something is not seating correctly. maybe the elbow under the maf isn't secure?

zuzu_pali

i made sure its very tight and fits good.

zuzu_pali

i will do just that sir thank you. so if it doesnt throw enoguh voltage thats why the cr might turn of at a stop?

zuzu_pali

but sir do you know any symtoms of car just dying at a light . or some times esp comes one once in a blue and i go into limp mode , but i restart car and it becomes fine. can it be conductor plate?