The Smart Roadster 452 has four designated jack points: two forward jacking pads beneath the front subframe area and two rear jacking pads behind the seats on the longitudinal sill reinforcements. Never place a jack under the plastic sill covers, the tridion safety cell seams, or the mid-rear engine undertray.
Getting under a Smart Roadster without knowing exactly where to place a jack is a genuinely risky business. The 452’s tridion steel safety cell architecture looks robust — and structurally it is — but the surrounding plastic bodywork, hollow sill cladding, and compact floor pan offer very little margin for error. Place a trolley jack in the wrong spot and you will crack a sill cover, deform a floor panel, or worse, allow the car to slip. This guide covers every smart roadster jack point in detail, the tools you need, axle-stand placement, and the common mistakes that cost owners money every weekend.
Understanding the Smart Roadster’s Unique Architecture
Before touching a jack, it helps to understand what you are working around. The 452 is built around a welded steel tridion cell — essentially a roll cage integrated into the chassis. Surrounding this is a mixture of plastic body panels and a compact floor pan. The car is low to the ground (ground clearance is roughly 110 mm at standard ride height), which means even a standard trolley jack can struggle to slide underneath without the car being driven onto ramps first.
Critically, the engine sits mid-rear, directly behind the seats. There is no engine in the front compartment — that space is purely luggage. This weight distribution means the rear of the car is significantly heavier than the front, which matters when you are deciding where to place axle stands and how to sequence your lift. The plastic undertray beneath the rear engine bay looks structural but is not — it is a heat and road-noise shield only.
Smart Roadster Jack Points: Front of the Car
The two front smart roadster jack points are located beneath the front subframe, one on each side. To find them, crouch at the front corner of the car and look inboard of the front wheel. You will see a short, reinforced metal pad welded to the lower front subframe rail. This is your contact point. It is typically visible as a flat, slightly stepped section of steel approximately 60–70 mm wide.
Place the saddle of your trolley jack directly under this pad. Use a rubber jack pad or a short piece of hardwood between the jack saddle and the metal to prevent point-loading damage. Raise slowly and observe whether the bodywork is taking any load — it should not be. If you see the plastic front bumper carrier flexing, you are too far forward. The front jack points sit roughly 200 mm rearward of the very front of the car.
Front axle-stand placement
Once the front is raised, place axle stands under the same subframe rails, slightly further inboard from the jack pad. The subframe rail runs longitudinally and offers a solid, flat surface for a stand. Never place stands under the front crash structure — it is designed to collapse in an impact and is not a static load-bearing point for maintenance.
Smart Roadster Jack Points: Rear of the Car
The rear smart roadster jack points are located along the reinforced longitudinal sill members, behind the rear wheels. The physical jack pad here is a welded plate on the inner sill structure, again accessible from beneath the car and identifiable as a flat metal surface distinct from the plastic cladding above it. On most 452s this pad sits approximately level with the rear trailing arm mounting point.
The rear of the car is where most mistakes happen. The large plastic sill covers run almost the full length of the car and look substantial, but they are decorative and will crack under jack load. You must get the saddle onto bare metal. A torch and a careful look before committing to the lift will save you an expensive repair. Because the engine is mid-rear, the rear end is heavier; use a jack with at least a 1.5-tonne rating — a cheap 1-tonne unit will manage the weight but offers no safety margin.
Rear axle-stand placement
Axle stands at the rear should be placed under the same longitudinal sill reinforcement, slightly outboard of the jack pad. Some owners also use the rear subframe crossmember as a secondary stand point when dropping the rear subframe for gearbox or engine access, but for routine tyre or brake work the sill reinforcement is correct and sufficient.
Lifting the Whole Car: Centre Jack Points and Ramp Use
For jobs that require all four wheels off the ground simultaneously — full brake system inspection or disc and pad replacement, for example — the cleanest approach is to use a set of four low-profile ramps in sequence, or to work axle by axle. There is no single central jack point on the 452; the floor pan simply does not have a reinforced central spine in the conventional sense.
If you must lift the entire car with one jack, the front subframe crossmember (the transverse steel bar connecting the two front subframe rails) can be used as a single central front lift point, with a wide-base rubber pad to spread the load. At the rear, the rear subframe crossmember behind the engine performs the same role. Jack one end, support on stands, then jack the other end. Never have both ends on jacks simultaneously without stands already placed — jacks are for lifting, not supporting.
Ramps are often the better solution for simple oil or filter changes. If your ramps are too thick to slide under without scraping, drive the front wheels onto a pair of shallow kerb blocks first to gain the extra 30–40 mm of approach clearance.
Essential Equipment and Safety Checklist
- Trolley jack: Low-profile model, minimum 1.5-tonne capacity. Standard trolley jacks often have too tall a closed height to slide under the 452’s nose — check the minimum height specification before buying.
- Axle stands: Rated to at least 1 tonne each. Use four stands whenever all four wheels are off the ground. Never work under a car supported only by a jack.
- Rubber jack pads: Protect both your jack points and the paintwork around them. Universal rubber pucks are inexpensive and genuinely useful.
- Wheel chocks: Place behind the wheels that remain on the ground. The Softouch gearbox does not hold the car stationary in the way a manual gearbox in gear does.
- Flat, solid surface: Never jack on gravel, grass, or uneven tarmac. The jack saddle or stand foot can sink or slide under load.
- Handbrake on, ignition off: Confirm before any lift. Also confirm the car is in ‘P’ or neutral — consult your owner’s manual for the Softouch park position.
For work that involves the wheels, confirm your tyre pressures and condition before refitting — our complete guide to 452 tyre sizes and pressures covers the correct figures for all variants.
What to Do Once the Car Is in the Air
With the Smart Roadster safely on stands, the range of work you can comfortably undertake is extensive. Routine maintenance that requires lifting includes oil and filter changes, coolant replacement, brake fluid bleeding, spark plug access from beneath, and tyre swaps. Many owners are surprised by how accessible the mid-rear engine bay is once the rear is lifted and the undertray removed — four bolts and it drops away cleanly.
A thorough service schedule will tell you which jobs require the car to be lifted and how frequently each item needs attention. If you are planning a coolant flush while the rear end is already in the air, the step-by-step coolant procedure for the 452 is worth reading before you drain the system — the bleed sequence on this engine is non-obvious and getting air out of the system requires care.
Inspect the sill covers and floor pan for corrosion, stone chips, and any signs of prior jack damage (dents, cracked welds) every time the car is up. The 452 floor pan is not especially corrosion-prone by European standards, but any car of this age deserves a visual check when you have the opportunity.
Common Mistakes and How to Avoid Them
The single most common error is jacking on the plastic sill cladding. It looks like a logical place — it runs the length of the car and is easily visible — but the cladding is bolted-on plastic over a hollow cavity. It will crack or deform under jack load. Always look for bare steel before committing.
The second mistake is using the engine undertray as a rear jack point. The undertray is an aluminium and plastic heat shield; it will bend and distort immediately. Related to this: some owners try to jack beneath the exhaust manifold heat shield at the rear — equally wrong.
Third, and more dangerous: lifting without wheel chocks in place. The Softouch automated manual gearbox is not a park pawl system in the traditional sense; on a slope, the car can move. Chock the wheels on the ground before the jack saddle takes load.
Finally, be aware that older cars may have corroded or previously damaged jack pads. Run your torch along each pad before lifting. If the metal looks thin, pitted, or previously bent, spread the load with a larger rubber pad or seek a professional lift.
Mastering the Smart Roadster jack points is one of the most practical skills a 452 owner can develop. Get it right once and every subsequent tyre change, brake job, or service becomes faster and safer. Use the correct four pads, respect the plastic bodywork, support on stands before you work, and never cut corners on capacity ratings. A low-profile trolley jack, four rated stands, and a set of rubber pads represent a modest outlay for a car you can then maintain confidently at home for years. Refer back to this guide whenever you are unsure — and always double-check the stands are seated before sliding underneath.
Frequently Asked Questions
Where exactly are the Smart Roadster jack points located?
There are four jack points: two at the front on the reinforced subframe rails, one each side inboard of the front wheels; and two at the rear on the longitudinal sill reinforcement members behind the rear wheels. All four are bare steel pads — never jack on the plastic sill cladding or the engine undertray.
Can I use a standard trolley jack on a Smart Roadster?
A standard trolley jack may be too tall in its closed position to slide under the 452’s low nose. You need a low-profile trolley jack with a minimum closed height of around 85–90 mm and a lifting capacity of at least 1.5 tonnes. Always confirm the minimum height specification before purchase.
Is it safe to use ramps instead of a jack on the Smart Roadster?
Yes, ramps are a safe and often easier option for work that only requires one axle to be elevated, such as an oil change or fuel filter replacement. Ensure the ramps are rated for the car’s weight, use wheel chocks on the wheels remaining on the ground, and confirm the surface is flat and solid before driving onto them.
What happens if I jack on the plastic sill covers by mistake?
The plastic sill cladding will crack, deform, or detach under jack load. Genuine Smart sill covers are increasingly difficult to source and expensive. The good news is the damage is cosmetic rather than structural — but it is entirely avoidable by locating the correct steel jack pads before lifting.
