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sprinkles08
sprinkles08, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 23102
Experience:  ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
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12 GL Bluetec...Hard starting in the AM Normal Temperature

Customer Question

12 GL Bluetec...Hard starting in the AM Normal Temperature outside. Almost like it is not getting enough fuel. Dealer had a code Cam Sensor. Replace it. Still doing it. I have a call into Tech to see if they cked rail pressure and did the injector check for leaks back. They want to do a timing chain and tensioner. PS I was a boat diesel mechanic 20 yrs ago and never replaced a timing chain...so I don't think this is the issue. Thoughts
JA: How many miles on the car? How responsive has your car been lately?
Customer: 65
JA: What is the model/year of your Mercedes?
Customer: 12 GL blue
JA: What year is your GL?
Customer: 12
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: 12 GL Bluetec...Hard starting in the AM Normal Temperature outside. Almost like it is not getting enough fuel. Dealer had a code Cam Sensor. Replace it. Still doing it. I have a call into Tech to see if they cked rail pressure and did the injector check for leaks back. They want to do a timing chain and tensioner. PS I was a boat diesel mechanic 20 yrs ago and never replaced a timing chain...so I don't think this is the issue. Thoughts
JA: Anything else you think the mechanic should know?
Customer: nope
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Mercedes Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Mercedes
Customer: replied 1 year ago.
What do I do now...
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

A fuel issue will definitely cause a long crank time but if it's missing cam or crank signal or they are not in sync that will cause a long crank time also. It isn't out of the question that the timing chain could be stretched enough to cause a fault code and hard start.

Are there any fault codes setting currently?

Customer: replied 1 year ago.
The only code was the cam sensor which was replaced
Expert:  sprinkles08 replied 1 year ago.
What P code is currently setting?
Customer: replied 1 year ago.
Just Cam Sensor which has been replaced
Expert:  sprinkles08 replied 1 year ago.

I need to know the P code number.