CL500 won't start
Thread Starter
Junior Member
Joined: Oct 2021
Posts: 49
Likes: 13
From: Milan, Italy
'06 Mercedes-Benz CL 500 (C216)
CL500 won't start
Hi guys, first problem with my CL500 after only 25 km....I got it from the dealer, all ok and at the evening it stopped in front of the garage.
It cranks, but not start...
Batteries are new (and I also recharged the start one during the night), all seems ok in the engine bay...at first it seems that at the end of the fuel rail there was pressure, but checked today I tried to push and nothing goes out...fuel in ok in the tank (3/4).
I tried to start the engine with spray and it tries to go on but....at the end nothing to do. All the fuses related to the fuel pump are ok, any suggest?
Thanks in advance for the support!
(i would like to share videos but I think are too big).
It cranks, but not start...
Batteries are new (and I also recharged the start one during the night), all seems ok in the engine bay...at first it seems that at the end of the fuel rail there was pressure, but checked today I tried to push and nothing goes out...fuel in ok in the tank (3/4).
I tried to start the engine with spray and it tries to go on but....at the end nothing to do. All the fuses related to the fuel pump are ok, any suggest?
Thanks in advance for the support!
(i would like to share videos but I think are too big).
MBWorld Fanatic!
Joined: May 2021
Posts: 2,528
Likes: 2,046
From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Are you able to pull codes? Assuming no codes, the basics
If you have a good scanner for MB, you may check the tank has what the gauge shows. With 3/4 there is no way main section is empty, but who knows
Then, you need fuel to make it to the engine. When you put the key in the ignition position, for very short time you should faintly hear the fuel pump priming under the rear seat. Check
Once fuel makes it to the engine bay, the pressure must be high enough for the engine to start, check fuel rail pressure
Once fuel is injected, the spark must be in sync with crank and cams, i.e crank position sensor
Good luck
If you have a good scanner for MB, you may check the tank has what the gauge shows. With 3/4 there is no way main section is empty, but who knows
Then, you need fuel to make it to the engine. When you put the key in the ignition position, for very short time you should faintly hear the fuel pump priming under the rear seat. Check
Once fuel makes it to the engine bay, the pressure must be high enough for the engine to start, check fuel rail pressure
Once fuel is injected, the spark must be in sync with crank and cams, i.e crank position sensor
Good luck
Hi guys, first problem with my CL500 after only 25 km....I got it from the dealer, all ok and at the evening it stopped in front of the garage.
It cranks, but not start...
Batteries are new (and I also recharged the start one during the night), all seems ok in the engine bay...at first it seems that at the end of the fuel rail there was pressure, but checked today I tried to push and nothing goes out...fuel in ok in the tank (3/4).
I tried to start the engine with spray and it tries to go on but....at the end nothing to do. All the fuses related to the fuel pump are ok, any suggest?
Thanks in advance for the support!
(i would like to share videos but I think are too big).
It cranks, but not start...
Batteries are new (and I also recharged the start one during the night), all seems ok in the engine bay...at first it seems that at the end of the fuel rail there was pressure, but checked today I tried to push and nothing goes out...fuel in ok in the tank (3/4).
I tried to start the engine with spray and it tries to go on but....at the end nothing to do. All the fuses related to the fuel pump are ok, any suggest?
Thanks in advance for the support!
(i would like to share videos but I think are too big).
test the fuel pump
check the filter
and keep in mind that you can not maintain these cars without a proper diagnostics tool
