mis3

My 2004 CLK320 now has more than 200,000 km (124,000 miles) on it.

While everything is working fine, I feel that my car has lost power. Is this normal for an older car?

Last air filter change: Jun-2010
Last oil change: Nov-2010
MAF change: May-2008
Last change of spark plugs: At 100,000 KM
Replace transmission fluid (partial): Feb-2009

Kevwood

Unless there is a major change in HP, I find it impossible to actually tell if a car has lost power (or gained for that matter, I mean really, can someone actually feel a 10hp increase from an ECU tune...), especially over a series of years. In your case though, no doubt that you aren't producing factory spec power anymore with 200,000km but it's probably not miles off. Only true way to tell - dyno run.

mis3

It's just a feeling when I drive the car lately.

I am not aware of any dyno run in Toronto.

According to FSS, I should change my oil in another 6K KM. I am thinking to change the spark plugs at the same time.

dynomite05

You could also change the spark plug wires.

mis3

I thought the spark plug wires should be changed when I have problems starting the car at rainy days.

Do these wires affect power as well?

dynomite05

Not sure. I usually change things before I have to to be on the safe side.

bheng

lol maybe your ready for the clk500 or any other upgrade?

i jk.

but sometimes i feel like that too. however when i do floor it, i still that sense of excitement. lol so maybe just push her a bit and see how you feel? =p

Klinh

What you felt probably just a sluggist performances. Do an ECU or/and MAF reset procedure and see if it help. I know the one mod that will bring back the feel of performance in your car again........Sprint Booster !!

dragon_27

second that, sprint booster all the way!

dynomite05

+3

mis3

I will do the ECU reset tomorrow.

What is a MAF reset? How do I do this?

M-bENZ

Have u ever cleaned the MAF sensors ?

mis3

I checked my repair records.

Back in May-2008, the MAF sensor was replaced when I experienced hesitation on acceleration from stop.

This was the only time the MAF sensor was worked on. I do not experience any similar hesitation symptom.

What does this MAF cleaning do? I did some research and this looks like something that has to be done in the sop.

08clk350

how can you tell if the ecu has been tuned? besides doing a dyno run?

dynomite05

The tune should also take off the speed limiter.

08clk350

how can i physically check tho? im assuming that obviously requires me to drive the car to 150mph?

dynomite05

Yup. Other than that, there is no way to really tell for yourself.

08clk350

im just going off of what kevwood wrote above about not telling if you gained 10hp. the only tune i am doing to my 350 is tuning the ecu so i wanted to see if i can physically check when i go to the shop today...

08clk350

was anyone able to tell by driving or starting the car when they got their ecu tuned?

dynomite05

I was able to "feel" the difference right after I had my ECU tuned.

08clk350

thanks dyno....you always seem to come through everytime i have a question about something....appreciate your help and sharing your, advice, knowledge, experiences.....

dynomite05

Not a problem. Looking forward to some update pics of the ride.

08clk350

brad said they are aiming to have my ride ready by this friday.....its been a while since i last driven it....made 2 payments already and 0 miles...

dynomite05

lol, I know how it feels. The payoff will be when you see the car for the first time.

tmy5645

hi ive just registered, how do i post a thread? im having problems with my sl55 "sat nav/comand centre" it wont turn on and MB have quoted 2 grand to fix