[dan2c1]

My car is not starting. I already replaced the spark plugs and cleaned the injectors, but my guess is that the problem is the fuel pump. The code reader gave me the following codes:
P0455
P0410
P0105
P0460
P0201
P0202
P0203
P0204

If someone can guide me and tell me what these codes mean and help me identify the real problem, i would really appreciate it. Thanks!

 

[Livefreeordie]

Starting at page 27

http://www.mbslk.com/files/artikel/r170_fehlercodes.pdf

 

[Livefreeordie]

Have a look at post #6 this is most likely the issue.

http://www.slkworld.com/slk-r170-general-discussion/1030-k40-relay-module.html

 

[dan2c1]

The relay looks fine, i ordered a new Bosch fuel pump and fuel regulator, i will install it next week and let everyone know if this solves the issue. The car was having trouble starting, then it doesn't start anymore. The pump is delivering no pressure, i read that it could be because of the Fuel Filter, i don't think i have ever replaced the fuel filter so that might be the problem.. however the injectors were quite dirty, so i'm gonna change the filter, the pump and the fuel regulator. I hope this will take care of the problem.

 

[Livefreeordie]

Once you replace the pump and filter run a fuel cleaner through the system to clean the injectors.

 

[curro101]

You say the relay looks fine, is that just a "naked eye" view ? So many have said it looks fine and then after looking under a magnifying glass or simply just reflowing the solders, found bad joints and fixed their problems....

 

[dan2c1]

I replaced the fuel pump yesterday, along with the fuel filter and the fuel pressure regulator. The car is perfect now, starts right away and runs like new.

 

[dan2c1]

UPDATE: The car is not starting or sometimes having intermittent starts; i'm replacing the existing K40 with a new one tomorrow. I'll keep you guys updated. I really hope this fixes the problem. Also, do you guys think there could be a connection between the roof not functioning and a faulty k40?

 

[El_Toro_33809]

What all the K40 relay does is one of the great mysteries of life..... But I don't think it interacts with the roof. What is you doing or not doing?

Tim

 

[dan2c1]

Update: Replaced the old k40 with a new one today and everything seems to be solved. No more codes on the scanner. The ASR light is still on and the roof still doesn't work but that must be something unrelated. The car is starting and running perfectly now.

 

[curro101]

The roof won't work due to your ASR fault, being speed related.. strange there's no error though! Silly question, your ASR isn't turned off by the button by chance ?

 

[dan2c1]

The roof won't work due to your ASR fault, being speed related.. strange there's no error though! Silly question, your ASR isn't turned off by the button by chance ?

I wouldn't know if it's on or off...the button seems to have no effect. How can i tell?

 

[curro101]

Doesn't it have a light or something?
Try pressing it to see if the ASR light goes out.

 

[dan2c1]

Doesn't it have a light or something?
Try pressing it to see if the ASR light goes out.

It doesn't have a light, it just says asr off and nothing happens if i press it. However i tried to "turn it off" tonight and the windows rolled down when i pressed the roof switch, wich usually doesn't happen, so the asr might be the root of the problem.

 

[dan2c1]

New update: the intermittent starts are back. A check engine light came
Up a few days ago but everything was working fine. Last night, the car didn't want to start. I had filled Up a full gas tank a couple of hours before; same thing as when the problems first began. Today, i turned it on and it started without a problem. What could be going on here? This is becoming a nightmare.

 

[dan2c1]

UPDATE: The alternator is not working properly, it was draining the battery. After cleaning all the contacts and charging the battery, the car starts fine and the vario roof is finally working once again after months of being dead. I ordered a new alternator and will install it week.