Forum: 450 fortwo - Technical Queries

When accelerating from under 3000 rpm in 6th I get a jolt/judder with a dip in power.Worse going up hill. No engine light/fault codes. This has slowly got a bit worse. If I use @50% throttle it does not happen. It is less noticable in 4th or 5th . I have had my mobile connected via OBD and...

Brake light switch? ESP/Trust+ and ABS warning lights are on and I do not have to use the foot brake from neutral to drive or reverse.

Yup, bought today, picking up tomorrow. First off, critically I know nothing about this model, so any info on 0.7 brabus pointers to threads etc appreciated. As it has done minimal mileage the last few years we will need to fit new seals & re-gas the air con. Yokohama, bad boy wide wheels?...

The car sits about 2cm lower on one side. I've jacked both wheels off the ground and there's no obvious break in the coil spring, and both sides appear to have the same number of coils. Is the break typically not visible until you remove the spring, and are there any other reasons for a difference...

I need to remove the rear driveshaft on my 450 smart to install a new wheel bearing. Is the big long bolt that goes into the drive shaft a 'one use' bolt that has to be replaced? Also i need to change a front wheel bearing, is the big bolt that goes through the wheel bearing into the front...

Can anyone advise what is involved in replacing the brake fluid reservoir on a 450, please? There are a couple of used ones on eBay, they seem to come with hoses attached. I think I'd prefer to detach the hoses at the reservoir, if that can be done, being the highest point, also I haven't seen...

Hi All, My 2006 450 Cabrio has a problem...any advice appreciated. A week ago it stalled for the first time when in 1st gear moving into my garage. Last Friday morning it did the same when parking up at work along with a "bunny hop/lurch" and thumping noise from the rear end. On way...

Any recommendations for replacement spark plug leads?(or ones to avoid) Need to replace at least two but will do all of them. A couple I have found https://www.carparts4less.co.uk/p/haas-ignition-lead-409915011£18.36...

Anyone help out directing me to a source please? I came across one that due to bad pictures has left me puzzled, centre front of gearstick appears to have an iphone / smart phone holder??? Correct y/n ? ..what else made this a special edition?

Whilst coming back from the usual drive, covering ground / roads normally travelled, we had a bit of twitch on the rear end at relatively low speeds at both roundabouts & when exiting & accelerating onto an on ramp for the motorway. Any ideas? ...is it simply a case of the wife driving harder &...

Afternoon all Apologies in advance for the long read, but as you'll see, I'm confused . . . . . . so I've found water under the front carpets of the Smart - which from what I've read isn't all that unusual - but what is unusual is how it's dispersed. The majority of the water is around the...

Don't hate me or think me an "abuser"... My smart is "technically" now overdue a service ( small one) a year having elapsed & at around 500 miles put on in 16 months I have to ask the question. Recently had a bust spring replaced in the garage when mot'd So yes, the spanner 🔧 icon is...

Hi everyone, my spare key fob isn't working so I changed the battery and still not working. I can get in by unlocking the boot manually but the immobiliser has been on and it won't start. (Used spare key for about a month but thought I should get it sorted incase anything happens to other one)...

My 450 CDI has had a replacement turbo, EGR valve and a new exhaust fitted but it is not making any boost whatsoever and I can't figure out why this might be. The actuator seems a bit stiff but apart from that, the car does appear to be running normally but severely lacking in power, meaning ~55mph...

Just been trying to swap my normal Smart 450 door card/pockets over with nicer Brabus ones, and the fittings are slightly different. The outline of the things is the same and all the other fixings fit, except the ones in the photo. Anybody come across this issue before? Just wondering the best...

Mysterious gear selection problem: Car sometimes won’t go into 1st, or reverse gear and stays resolutely in neutral. Initial thought is, of course it’s the clutch actuator, but the car starts - no 3 lines on the dash. I’ve recently rebuilt the engine and so I checked and greased the clutch...

I’ve been tidying up a wee bit and found in my shed six litres of synthetic oil from 1984. At that time synthetic oil was rather expensive and I only used this oil for winter. Drained it early May and replaced with standard mineral oil. I wonder if this old oil now is still safe to use. From...