Glow plug fault, E350 saloon 2010

[KellyMK]

I have an intermittent fault, and on start up the car splutters until throttle is added, local garage said it might be a glow plug issue? appreciate any pointers

 

[onefortheroad]

Cycle the ign on and off 3 times . Wait 10 seconds between each cycle . See if things improve.

 

[CowleyStJames]

Read your fault codes, without doing this step it's purely guess work

 

[mioba]

glow plug light would come on and stay on for longer if a fault with GP circuit (plug or relay. Change all the plugs at the same time..

local garage is guessing, needs to go on diags.
Spluttering could be a million and one things, blocked fuel filter, manifold leak, boost leak, no fuel, so on and so forth

 

[KellyMK]

glow plug light would come on and stay on for longer if a fault with GP circuit (plug or relay. Change all the plugs at the same time..

local garage is guessing, needs to go on diags.
Spluttering could be a million and one things, blocked fuel filter, manifold leak, boost leak, no fuel, so on and so forth

Thanks, its having a diagnostics test tomorrow morning, will see what that shows

 

[malcolm E53 AMG]

Interesting to see what diagnostics show possibilities are a glow plug relay or one or two glow plugs failing. The earlier OM642 was noted for burning through relays <100k miles not so much the later >2009 engines - you don’t mention the mileage the car has done which is always a factor?

This shows the relay module replacement procedure:

Glow plug replacement:

 

[onefortheroad]

Thanks, its having a diagnostics test tomorrow morning, will see what that shows

Did you try my advice ?? These engines are prone to leaking fuel back to tank overnight. Cycling the ign primes fuel pressure to the max ,ready for a start .

 

[KellyMK]

Interesting to see what diagnostics show possibilities are a glow plug relay or one or two glow plugs failing. The earlier OM642 was noted for burning through relays <100k miles not so much the later >2009 engines - you don’t mention the mileage the car has done which is always a factor?

This shows the relay module replacement procedure:

Glow plug replacement:

Thanks for this information, car has done 157k/miles.

 

[KellyMK]

Did you try my advice ?? These engines are prone to leaking fuel back to tank overnight. Cycling the ign primes fuel pressure to the max ,ready for a start .

Not yet, it wouldnt start this morning, tried 3 times to do so, it eventually kicked in but was making a lot of strange noises. Diagnostics being done tomorrow, Thanks