New car - Break in speed?

[FaeLLe]

I remember when buying my SL a few years ago the dealership advised me to drive at less than 60 km/h for the first 1000 kilometres (this was outside UK) to allow the car to "break in".

Can someone advise if a similar advisory still exists or is the car open to floor at motorway speeds straight from 0 miles on the odometer?

Thanks!

 

[NDFR]

I didn't hear about the need to so this for over 40 years.

 

[whitenemesis]

I was always advised to drive 'normally' but to try and vary speed and revs. Long motorway drives at a constant speed not good for a new engine.

 

[automaniaman]

Running in a new car | The AA

 

[Benzowner]

Speed has nothing to do with running in, it's engine revs. My only new Merc, I was told not to exceed 3000rpm, about 95 in top.

 

[Giantvanman]

Better to rev the engine (normally, not reline, you understand) than allow it to labour in a lower gear was the old saying.

 

[gIzzE]

Let it warm up and then give it some beans is what many believe is far better, better bhp and better consumption in later life.

 

[BTB 500]

Break-in requirements (if any) are given in the handbook.

 

[FaeLLe]

Let it warm up and then give it some beans

What does give it some beans mean please?

 

[stwat]

What does give it some beans mean please?

Beans help to lubricate the cylinder walls during the running in period.

 

[BTB 500]

What does give it some beans mean please?

It's a slang expression meaning lots of throttle (hard acceleration).

 

[stwat]

^ Spoilsport

 

[renault12ts]

I remember when buying my SL a few years ago the dealership advised me to drive at less than 60 km/h for the first 1000 kilometres (this was outside UK) to allow the car to "break in".

Can someone advise if a similar advisory still exists or is the car open to floor at motorway speeds straight from 0 miles on the odometer?

Thanks!

60 km/h (37.5 mph)...are you sure??

 

[tec]

It's a slang expression meaning lots of throttle (hard acceleration).

I thought it was welly, as in give it some welly.

Maybe it depends if you are from up north or down south.

 

[190]

Whether you call it beans or welly the theory is or was that with new piston rings you need enough revs to get the gas pressure behind them (that's how piston rings work) to push them into the cylinder wall with enough force to bed them in on the cross hatching of the bores before said cross hatching is worn down. The risk of molly coddling the engine is that the cylinders glaze up before the rings bed in which at best leads to a prolonged period of running before they do bed in.

Running in requirements might depend on whether the cylinders are "Nikasil" coated alloy or the older cast iron liners. I quite like the simplicity of liners. Nikasil is great when it works but several manufactures seem to have made a mess of it recently with resulting very high oil consumption. Speaking of which if your new engine is still using a lot of oil then it probably isn't run in yet.

I do agree about going easy on new brakes and tyres as they do need running in.

 

[G.P]

I was always advised to drive 'normally' but to try and vary speed and revs. Long motorway drives at a constant speed not good for a new engine.

^This for me..

 

[GLK]

I wonder, how many people who bought a brand new, every box ticked, top of the range, etc, etc, car, which they then sold / traded in at 3,000 miles, would bother to even think of stuff like that ...

 

[Steveml63]

Hi,
Our new ML63 had a sticker on the windscreen with running-in instructions for the first 1000km.
Sticker was removed on day one (and largely ignored!!).
We ensured car was warmed up from readings on the AMG specific dash menu - then drove it fairly normally for first 3000km - up to red line but not for prolonged periods.
Car needed to visit dealer at 3000km for a diff oil replacement service - at a cost of £200!
Since then - car has been driven totally normally at whatever speeds we feel like - after engine is fully warmed up.
Cheers
Steve

 

[pmw103]

Hi
I can't copy paste from it
But if you go to the apple App Store there is something called
Mb guides
Browse to the sl guide
Search for running and you will see it

Basically it says don't go beyond 2 thirds of the Rev range

Hope this helps p

 

[MancMike]

^
https://itunes.apple.com/gb/app/mercedes-benz-guides/id493497188?mt=8

https://play.google.com/store/apps/details?id=com.daimler.moba.kundenapp.android&hl=en_GB