petar13

Hello, I am driving 2001 c200 cdi and i am facing this issue. Fuel is not the problem. Sometimes it cranks only but most of the time its like this
Link to the video on google drive

Petethepug

I’m by no mean an expert but am impressed you didn’t use any sentence enhancing words during that process. Thanks for including the visual. It says it all.

If it were a gasser I’d say crank position sensor. Since it’s common rail diesel injection that also comes back to fuel pump. Able to pull any codes off the beasty.

C230 Sport Coup

1. Read codes
2. Follow the trail
3. No codes? As de pug say, CPS OR
Fuel pressure ie pump. But you say fuel is not an issue?
How and why?

slammer111

Fuel pump would be my guess. There is no CEL when it fails.

Charlie401

do you have access to a scan tool?
I would check the mpa of the pump from the suction control valve solenoid.
you should see 30 to 35mpa at idle or cranking general speaking

if you are getting a reading of 25mpa the car may start
if it is less than 25mpa it properly won't start
since it is still reading a value of example 20mpa it won't throw a code it just thinks there not enough fuel pressure to start the car and keep it running

also a scv has only 2 bolt and cost is only a small amount you will properly have to goto to a diesel specialist to get the part cause mb will only sell the pump complete

you may have noticed more inconsistency/or rougher idle for a few months or it cranking longer to start

petar13

I managed to get it started, when i start it it works normally. taking it to mechanic

Petethepug

Leave a couple of sandwiches and bitters in the boot after the car is dropped off. Call from home and tell the tech to enjoy it since you forgot it

petar13

it was CPS, part no. a003 153 97 28

Petethepug

Win! I see there are some knock off brands that are made of 100% plastic too.