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No crank. 2009 cl550. Starter was seized when relay bypassed…

2009 cl550 Mechanic's Assistant:...

2009 cl550

Mechanic's Assistant: Are you fixing your CL550 yourself? What have you tried so far?

Starter was seized when relay bypassed is starts fine

Mechanic's Assistant: How many miles are on the car? Has the car been starting normally?

125000km

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Answered in 4 hours by:
11/17/2017
Wolfgang
Wolfgang, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,219
Experience: master tech benz ase cerified L1 and L2
Verified
Hello I’m Wolfgang. I do need a vin # to get the factory info to assist.
Which relay was bypassed? How did you bypass please be very descriptive of where and how. Thanks
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Customer reply replied 8 months ago
Wddej86x29a022620, starter was replaced at another shop still no crank fuse 20 inspected good and replaced regardless, relay H in front Underwood was bypassed and vehicle starts no signal to relay to allow crank.
Thanks for the info let me get the information and will get back ASAP with some checks to do You will need a digital volt meter. Thanks
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Customer reply replied 8 months ago
Any luck yet

sorry my son had surgery!! is fuse 21 blown?

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Customer reply replied 8 months ago
Location?

front sam f21

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Customer reply replied 8 months ago
15 amp?
Customer reply replied 8 months ago
Fuse 20 or 21 fuse 20 is in front of the battery correct? 20amp
Customer reply replied 8 months ago
Fuse good

do you have 12 volts both sides of the fuse key on?

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do you have scan tool?

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make and model of scan tool you have please.

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Customer reply replied 8 months ago
I have xentry but I have no wiring diagrams
Customer reply replied 8 months ago
Only fault is central gateway module failure need to know if signal from EIS passes through CGW
Customer reply replied 8 months ago
My suspicions are the vehicle was boosted incorrectly only fuse blown third 15amp fuse on left side from the bottom which I have no idea what it’s for

check the prefuse box !!!

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Customer reply replied 8 months ago
Location? Everything thing else works
Customer reply replied 8 months ago
If prefuse box was issue I shouldn’t have Power at fuse 21

checked and EIS TO CGW TO FRONT SAM TO STARTER..

WHAT # IS THE FUSE THAT BLEW?

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Customer reply replied 8 months ago
Car not in front of me at present but picture forwarded from you to me first 15 amp from the bottom on left hand side can’t make out the number

having trouble with that fuse !!! still looking !!

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Customer reply replied 8 months ago
No worries for tonight I’m sorry you’ve got lots on your plate with your family if I may touch base with you in the mid morning?
Customer reply replied 8 months ago
Thanks so much for your help

sure my pleasure

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Customer reply replied 8 months ago
Great thanks again

hey just got back in !! kid doing much better!! any new info or updates?

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Customer reply replied 8 months ago
No ground signal at me module pin31 to activate relay and thoughts
Customer reply replied 8 months ago
Constant power at pin 31
Customer reply replied 8 months ago
if I ground circuit at pin 31 starts no problem

ok did you scan the vehicle for codes . need to check cgw, me, front sam , rear sam module . preferred to total car scan . if me is not taking care of the signal most likely a fault code is stored!!

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Customer reply replied 8 months ago
Only code is cgw failure

in what module . can you show a pic of scan tool or print out?

thanks

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cgw needs to be replaced then scn coding and possible reprogramming may be needed at MB dealer .

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Customer reply replied 8 months ago
Problem was electric shifter lost its location program all good now

ok

Wolfgang
Wolfgang, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,219
Experience: master tech benz ase cerified L1 and L2
Verified
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