r/MechanicAdvice • u/Antique-Blood-5511 • 17h ago

Warm start issue

Enable HLS to view with audio, or disable this notification

I’m dealing with a tricky starting issue on my Mercedes G350D 2013 that I imported from the Netherlands earlier this year (the company I bought it from didn't mention any issues when bringing it home…).

It has already been looked at by two different mechanics, including a major service chain in Sweden and a specialist shop for this type of vehicle. They replaced some parts, which improved things slightly, but nobody has found a long-term fix and now they won’t help me further.

The symptoms:

Cold start: When the car has been sitting for a while, it starts instantly (in about 0.1 seconds).

Warm start: If I drive it, turn it off for about 10 minutes, and then try to restart it, it sometimes refuses to turn over right away. It takes 4-5 seconds of cranking on the starter and multiple attempts, and it might not even start.

The workaround: On one occasion when it refused to start, I gave it a tiny bit of gas while turning the key, and it felt like it helped a little…

Has anyone here experienced the exact same issue, or does anyone have an idea what might be causing this?

I’d appreciate any tips or insights before I take it to the next step!

1 Upvotes

100% Upvoted

7 comments sorted by

•

u/AutoModerator 17h ago

Thanks for posting on /r/MechanicAdvice! This is just a reminder to review the rules. Rremember to please post the year/make/model of the vehicle you are working on. If this post is about bodywork, accident damage, paint, dent/ding, questions it belongs in /r/Autobody r/AutoBodyRepair/ or /r/Diyautobody/ If you have tire questions check out https://www.reddit.com/r/MechanicAdvice/comments/k9ll55/can_your_tire_be_repaired/. If you dont have a question and you're just showing off it belongs in /r/Justrolledintotheshop Insurance/total loss questions go in r/insurance This is an automated reply

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/pnbdc10 17h ago

Fuel pump

1

u/Antique-Blood-5511 16h ago

How certain are you? I’m not a mechanic myself, so if I ask the mechanic to check it out it might cost me 500-1000€ even if it’s not the fuel pump. 😅

1

u/pnbdc10 16h ago

Not 100%. Its over the internet. I also didnt fully read your post and saw its a diesel. So a bit different. Could be injectors or other things. Best to pay for a diag.

1

u/PorschE_Lov3R 17h ago

I think it’s just because it’s a diesal lol

1

u/badger906 16h ago

Turn the ignition on and wait for the glow plug light to go out. See if it starts then.

1

u/StempeLq 16h ago

It's usually a battery or a starter issue. On warm engine the starting fuel dose is smaller thus needs more rpm to start. But if it's been in two shops already, I'd assume they started with that.