# Mercedes CL 500 C215

> The free buying guide from Last Real Engines, updated 2026-10-13. Web version: https://lastrealengines.com/cl500-c215/free-guide/ · full guide: https://lastrealengines.com/cl500-c215/
## The story

*What this car is, and the six questions that decide whether the one you are looking at is a good buy*


## 1 · Who built it, and what they built

There is no pillar.

That is the first thing you notice about a C215 CL, and it is the thing that explains everything else
about it. Drop all four windows and there is nothing between them: no B-pillar, no window frames, five
metres of coupé with an uninterrupted opening down the side. Mercedes built the roof out of bonded
aluminium, made the inner door frames from magnesium and the boot lid and front wings from composite —
lightweight construction that, by Mercedes' own figure, saved up to 340 kilograms against the C 140 before it.

That is a car built by people who were not being asked what it cost. In 1999 a CL 500 cost more than a
house deposit. Now it costs less than a well-specified new hatchback, and everything that made it
extraordinary is still in it — which is exactly the problem and exactly the appeal.

### The engine

The **M113 E50**: 4,966 cc, V8, **306 PS at 5,600 rpm and 460 Nm from 2,700 rpm.** Naturally aspirated,
three valves per cylinder, twin spark — so **sixteen spark plugs** — and it takes **eight litres of oil.**

And here is the sentence that shapes this whole guide: **the M113 is not the problem.** It has a
reputation among Mercedes specialists as one of the most durable petrol engines the company ever built —
"bullet proof" is the word that comes up — and specialists treat 160,000 km as unremarkable on a
maintained example. The engine chapter in this guide has no weak-point list in it, and that is not
laziness — it is the honest answer.

### The transmissions

The **722.6 five-speed automatic** on cars built up to August 2003, and from September 2003 the **722.9
seven-speed** (7G-Tronic) on the CL 500. Both are known quantities. The five-speed has one specific item — the conductor plate — and it is
neither rare nor expensive relative to what people fear.

### And the thing that decides what a CL costs you

**Active Body Control.** Not an option on this car: **standard, on every single one.** Hydraulic
suspension with a high-pressure pump, accumulators, pipes running the length of the car, and a strut at
each corner that combines a coil spring with a hydraulic plunger cylinder, alongside a gas-pressure damper.

When it is working, it is remarkable — a two-tonne coupé that does not lean. When it is not, a single
corner is **skilled work on an expensive part**, and a full overhaul is **the most expensive thing on the
car.**

So the two weak points of a C215 are **ABC and corrosion**, and neither of them is the engine. This guide
is arranged around that fact, and the most valuable thing in it costs nothing to check — **and it
takes a minute.**

### How the figures in this guide work

**How much work each job is, not what it costs.** Every point in this guide carries an effort — an hour
or two, half a day, a day, two or three days, or a week or more in the workshop — plus a line saying
whether the money sits in the part or in getting to it.

**There are no prices, and that is deliberate.** What a job costs depends on which country you are in
and which workshop you walk into, so a figure I cannot verify is worse than no figure. If you want
money, ask any workshop one question — *what is your hourly rate?* — and every effort in this guide
becomes your own number, in your own currency. One question, and the answer is actually true for you.

None of this is advice about one particular car, because I have not seen the car you are looking at.
Have every one of them inspected before you buy, by someone who knows this engine.

---

---

## 2 · The six questions that decide whether *this* car is a good buy

This is one of the cheapest genuinely special cars you can buy, and that is exactly why the questions
matter. Six of them, and the first one is free.

**1 · What colour is the ABC fluid?**
On this car old hydraulic fluid does not simply get tired — it works its way through the system
destroying the seals, the hoses and the accumulator diaphragms from the inside. A car with neglected
fluid and no leaks yet is a car with leaks coming. What it should look like, and what each answer means
for the rest of the system, is in the buying guide. This costs nothing, takes a minute, and it is the
single most informative thing you can do to a CL.

**2 · Is any corner sweating?**
The struts, the pump and the pipes that run between them are where the hydraulics give themselves
away, and a strut is an expensive part. What a sweating corner means, and where to look with the torch,
is in the buying guide.

**3 · What does the ABC system pressure read?**
This is the one you cannot see. A pump that is just about managing what it is supposed to manage gives no
warning light and no leak — it shows up only as a number in the measured values. Ask for it explicitly at
the read-out.

**4 · Where is the body corroding?**
This body is a mixture of steel, aluminium, magnesium and composite, and that changes where you look.
**The front wings and the boot lid cannot rust — they are plastic.** Cars from before 2003 are worse.
And one of the places that matters sits behind plastic, which is why almost nobody looks. Where
it does corrode, in order of how much it matters, is in the buying guide.

**5 · Which build month, and therefore which gearbox?**
Five-speed on cars built up to August 2003, seven-speed from September 2003. The facelift came a year
earlier, in autumn 2002, with new lights and a revised interior — so a facelift car is not necessarily a
seven-speed car. A late car is a materially better buy than an early one, and the price
difference is usually less than the difference in what it will cost you.

**6 · What has already been paid for?**
On this car the folder matters more than the odometer. ABC work, an ABC fluid change, corrosion repair
and gearbox work all leave no trace except on paper.

### What the honest answer to all six looks like

On a car with history, where the ABC has been maintained and the corrosion dealt with, an owner spends
**roughly a third of the ordinary list in the first two years, and none of the big jobs** — a handful of
half-days spread over two years. And then ABC on top of that, if and when it comes, which is why ABC has
a chapter of its own rather than a line in a total.

And one sentence that applies to this car more than to anything else in this series: **the cheapest CL on
the market is not a cheap car, it is a deposit on a suspension overhaul.** A documented example at twice
the price is frequently the less expensive purchase. This guide is mostly about how to tell the difference
while you are standing next to it.

The buying guide takes each of these six
apart, adds the things that are simply twenty years old, and gives every one of them how much work it is, what
tells you about it at a viewing, and whether it has to be done now or can wait years. It ends with a card
you print and take with you, in the order you do it, including the two moments at a viewing that come
only once.

---

---

## 3 · Which years, which specification

Built from **1999 to February 2006**, at Sindelfingen, on a platform shared with the **W220 S-Class** —
75 mm shorter in the wheelbase than the standard saloon, and two doors instead of four.

**Two dates matter, a year apart.** The facelift arrived in autumn 2002, with revised lights and a
better cabin. **The seven-speed 7G-Tronic** followed in September 2003; every CL 500 built before that has
the five-speed automatic. And the worst of the aluminium corrosion is on cars from before 2003.

**The engines, and which conversation you are having.**

*CL 500.* The M113 E50, 306 PS — or 299 PS on cars ordered with automatic cylinder shut-off, an option
up to April 2003. The one this guide is about, and the one Mercedes specialists point people
towards: the least complicated, the kindest on the wallet, and the least troubled by the oil leaks that
spoil the twelve-cylinder cars.

*CL 55 AMG.* Naturally aspirated at first, and **supercharged from the autumn 2002 facelift** — the M113 K,
500 PS. A different car, a different set of costs, and a different guide.

*CL 600.* The M137 V12 with automatic cylinder shut-off until the facelift, and from autumn 2002 the
**M275 twin-turbo, 500 PS**. Everything in this guide about the body and about ABC applies to a CL 600.
Of the engine chapter, only the five-speed gearbox does: every CL 600 has it.

**What to establish per car:**

*The ABC fluid colour, before anything else.* It is free and it is the most informative single check on the
car.

*Whether ABC work has been done, and which parts.* A car with a documented ABC overhaul is worth real
money and a good seller knows it.

*The build month.* Facelift from autumn 2002 (lights, interior), seven-speed gearbox from September 2003.

*The corrosion that hides behind plastic.*

*And whether it has been standing.* An ABC system that has not moved for a year is a system whose seals
have dried out. A car with two owners and continuous use beats a low-mileage car that lived in a garage,
and on this model that is not a general platitude — it is specifically about the hydraulics.

Beyond that, look for a car nobody has modified. Factory wheels, standard ride height, the original exhaust. A modified CL is a car whose owner did not
understand what he had.

---

## 4 · What it is worth

This is the hardest thing to establish on your own and it does more than anything else to decide whether
you buy well. I am not going to give you a price list — it varies by country and by month, and an
out-of-date number is worse than no number. I am going to give you the method.

**On this car, the ABC system is the price.** Everything else is ordinary. Two CLs at the same money can
be a full ABC overhaul apart, and the difference is invisible from the driver's seat because a failing ABC
system drives normally right up until it does not.

**There are three kinds of car for sale, and each one deserves a different offer.**

*The documented car.* Full history, ABC invoices, an owner who knows when the fluid was last changed.
Asking price at the top of the market and, on this model, frequently a bargain in disguise.

*The tidy car with no paperwork.* Drives well, looks well, sits level, and the owner says it has never
given trouble. The most dangerous of the three, because a CL sits level until the day it does not, and
neglected fluid is doing damage the whole time.

*The project.* A corner down, a warning on the dash, a price adjusted to match. Be careful here in a way
you would not be with a cheaper model: a CL needing a full ABC overhaul is worth less than nothing to most
garages, and buying one means committing to the overhaul before you have driven it properly.

**How to set the three against each other.** Take the asking price, work through the lists, and add up
what is coming in the first two years — with ABC as a separate line, because it is not an average, it is
a yes or a no. Call the result the entry price and compare entry prices rather than asking prices.

**And one thing that is specific to this car.** The market has already decided that a C215 is a cheap
car, and it prices them accordingly, largely regardless of condition. That is unfair to the good ones and it is
your opportunity: a properly maintained CL 500 often costs less extra than the work it has had, because
buyers cannot tell them apart. You can.

**Where to look:** your country's big classified sites, the Mercedes specialists, and the auction sites.
Follow the market for a month before you go and see anything. And pay attention to how long cars sit: on
this model, a car advertised for four months is usually a car that several people have looked underneath.

---

## 5 · What it is actually like to own one

You drop all four windows and drive with your elbow on the sill, and there is nothing beside your head.
That is the whole car, and it is worth the rest of this chapter.

It is quiet in a way modern cars are not, because it was built when quiet was the point. The V8 is
unhurried and enormous-feeling and almost inaudible until you ask, and then it makes a noise from a long
way away. It covers five hundred kilometres without you noticing, and it does it while not leaning in
corners, because of the very system that is going to ask you for money.

And people are kind to it. This is not a car that attracts hostility. It looks expensive and old and
faintly dignified, and nobody knows what it cost or what it is worth, so you get admiration rather than
attention.

**What it costs you in attention.** More than a modern car, and almost all of it in the suspension. Look
after the ABC fluid; on this car no habit is worth more. Do not ignore a car that is sitting slightly
low on one side. And keep a good battery in it, because this car's electronics do not forgive a weak
one.

**And it drinks.** A five-litre V8 in a two-tonne coupé. Eight litres of oil at each service, and
sixteen spark plugs when they are due. Look up your own country's road tax before you fall in love, because on a car of this
capacity that figure is frequently the deciding factor.

**What it gives back.** A pillarless five-metre coupé built without a budget, for the price of a used
family car, with a five-litre V8 that will outlast most of what is on the road now. That is not an
investment and you should not call it one. It is something else entirely: the cheapest way there has ever
been to own something that was genuinely built to be the best.

---

## The buying guide — €24

Everything above is what the car is. This is what you check.

Six faults that belong to this engine, taken apart one by one, with
how much work each repair is and how to tell which of them you are looking at.
Thirteen things that are simply twenty years old, every one
with how much work it is, what tells you about it at a viewing, and whether it has to be done now,
within a year or two, or not at all. Where this body corrodes and where it cannot, because the panels are steel, aluminium, magnesium and plastic — and the one place almost nobody looks. Active Body Control: how much work each part of it is, the free check that decides everything, and why replacing one strut on a neglected system is money you will spend twice. The viewing in fourteen steps, including the
two moments that come only once. The sentences you say to the seller, and how to build an
offer out of what you found.

And a card you print and take with you — sixty-two lines, in the order you do them.
That comes as a separate file, because nobody wants to print a whole guide to take a few pages to a
car park.

### This is what one of the thirteen looks like

**7 · The multicontour seats and their pneumatics**
**Half a day** per seat, only on cars that have them · expensive part, difficult access
Little pumps and bladders in the backrest, and the bladders perish.
*How you notice it:* work every function of both front seats through its full travel, including the
lumbar and side bolster adjustment, and listen for a pump that runs and runs.

Leave it unless the seat has collapsed on one side. This is comfort, not condition.

### And this is how the card reads

- [ ] 1 · The ABC fluid · *before the engine is even started*
- [ ] 2 · Underneath, with a torch, before the drive
- [ ] 3 · The cold start, and the rise
- [ ] 4 · The engine bay, cold
- [ ] 5 · Round the outside · *know what the panels are made of*
- [ ] 6 · The pillarless windows · *all four*

### What €24 buys, put next to what it saves

Active Body Control is **half a day per corner on an expensive part**, and a full overhaul is **two or three days and the most expensive job on the car.** A fluid and filter change is **an hour or two** — and the colour of that fluid is free to check. The guide is **€24**. It will not stop any of that from being needed — but it does
tell you which of them you are looking at before you agree a price, and that is the whole of the
difference between paying for a car and paying for someone else's postponed maintenance.

### Why there are no prices in it

Because a price we cannot verify is worse than no price, and because a price would be wrong for most of
the people reading this anyway. Workshop rates across Europe differ widely, and so do parts prices. A quote from a specialist in one country tells you nothing in another.

**What does not change is how much work a job is** — that follows from what has to come off the car.
So every point in the guide says whether it is an hour or two, half a day, a day, two or three days, or a
week or more in the workshop, with a labour figure where a source gives one. And it says whether the money sits in
the part or in getting to it, which is what lets you tell a fair quote from a bad one.

If you want a figure, ask any workshop one question — *what is your hourly rate?* — and every effort
level in the guide becomes your own number, in your own currency. One question, and the answer is actually true
for you.

### How this guide was put together

Because you should know before you pay for it.

- Every fault and symptom comes from a source the guide names, the manufacturer's own documents first. The
  effort levels are our assessment, unless a source gives the hours.
- It says where the sources disagree — the ABC fluid interval — instead of inventing a number, and it gives you a habit that works either way.
- The effort of every job is counted item by item and checked against the list before every edition.
- It says as plainly what you can leave alone as what you have to do. Four of the
  thirteen age points start from *leave it*.

Leave your email address at the checkout and both files arrive straight away: one guide and one card,
as two pdfs. No subscription, no account.

[Buy the Mercedes CL 500 C215 guide — €24](https://lastrealengines.com/cl500-c215/)

*Have every car inspected before you buy by someone who knows this engine. This is general information
about the model and not advice about a specific car.*