Buying guide · 1995–2001 · M104, M119, M120
Mercedes SL R129
Everything that decides whether the one you are looking at is a good buy or an expensive one.
16-page guide, A4 and phone · 2-page inspection card · instant PDF · VAT included
In the guide
What the Mercedes SL R129 guide covers
- 01Every fault this engine has, and how much work it is
- 02Why the build year matters for the wiring harness you are buying, and why a stored car is worse than a used one
- 03Where an R129 shell rots out of sight, and what the plastic covers are hiding
- 04What is simply thirty years old — and can be left alone
- 05The inspection card: the whole viewing on paper, in order, to take with you
- 06What to say to the seller, and what to keep to yourself
From the guide itself
This is how it reads
This is what one of the twelve looks likeLast Real Engines
1 · The sills and the jacking points, under their covers
Two or three days · at worst, in a bodyshop; nothing at all if you look in time
The one item here that can turn structural, hidden behind plastic that clips off in a minute. There is no symptom, which is why it has to be a question and not an observation.
Now, before you travel — ask permission to unclip the covers.
And this is how the card readsLast Real Engines
- Standing, before you start it
- Running
- On the move
What €24 buys, put next to what it saves
The sills and the tubular jacking points corrode under plastic covers, unseen, for years — and if they have gone it is two or three days of bodyshop work on a car otherwise worth ordinary money. It is also free to check: the covers clip off in a minute. 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.
VAT included · sold by Lemon Squeezy as merchant of record · questions first? buyersguide@lastrealengines.com
Start with the free guide
The six questions that decide whether this car is a good buy
- What year is it, exactly?
- May I take the sill covers off?
- Does the roof open and close fully, more than once, while I watch?
- Is there any staining in the headlining near the header rail?
- Has the engine loom ever been replaced, and is there an invoice?
- Is there any wetness around the gearbox electrical connector?
Start with the free guide: what this car is, and the questions that decide whether the one you are looking at is a good buy or an expensive one.
Before you buy
Questions
What exactly do I get?
The full guide as a PDF, 16 pages in A4, plus a phone edition to read at the car; and the inspection card, 2 pages to print and take to the viewing. €24, VAT included.
How is it delivered?
Straight after payment you get a download link for the guide, the phone edition and the card. No subscription, no account.
Can I get a refund?
EU consumer law gives you fourteen days to change your mind. For digital content that right ends the moment delivery starts, provided you agreed to that at the checkout. If the file will not open, or you were sent the wrong car, write to us and we will fix it or refund it.
Who handles the payment?
Lemon Squeezy, who sell the guide to you as merchant of record. They charge the VAT at the rate of your country, send the invoice, and email you the download link. We never see your card.
Why are there 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 it: workshop rates across Europe differ by a factor of two or three. What does not change is how much work a job is, so every point says whether it is an hour, half a day, a day, or a week in the workshop. Ask your own workshop for its hourly rate, and every hour in the guide becomes your own number.
Is this advice about a specific car?
No. A guide tells you what to look at; it is general information about the model and not advice about a specific car. Have every car inspected before you buy by someone who knows the engine.
More Mercedes-Benz guides
Going to look at a Mercedes SL R129?
Take the guide and the card with you.
16-page guide, A4 and phone · 2-page inspection card · instant PDF · VAT included