# Mercedes-Benz SLR battery: what each engine takes, with prices

> For the Mercedes-Benz SLR (2 generations, 2004-2025) we carry 4 matching batteries, rated between 13 and 95 Ah with 200 to 850 A cold cranking. Prices open at 70.20 €, VAT included.

## Which battery does a Mercedes-Benz SLR take?

It depends on the engine and on whether it has Start-Stop. The table shows the recommended battery for each Mercedes-Benz SLR engine with its price, VAT included; with your number plate or VIN we tell you the exact one in seconds.

## Recommended battery for each Mercedes-Benz SLR engine

| Engine | Generation | Recommended battery | Price | URL |
|---|---|---|---|---|
| 5.4 (460 kW / 626 CV) | Slr Roadster (2006–2025) | Varta A7 70Ah | 134,95 | https://baterias.com/gb/car-batteries/mercedes-benz/slr-roadster-r199/54-460-kw-626cv |
| 5.4 (478 kW / 650 CV) | Slr Roadster (2006–2025) | Varta A5 95Ah | 179,99 | https://baterias.com/gb/car-batteries/mercedes-benz/slr-roadster-r199/54-478-kw-650cv |
| 5.4 (199.376) (460 kW / 626 CV) | Slr (2004–2025) | Varta A7 70Ah | 134,95 | https://baterias.com/gb/car-batteries/mercedes-benz/slr-r199/54-199376-460-kw-626cv |
| 5.4 722 Edition (478 kW / 650 CV) | Slr (2004–2025) | Varta A5 95Ah | 179,99 | https://baterias.com/gb/car-batteries/mercedes-benz/slr-r199/54-722-edition-478-kw-650cv |

## Mercedes-Benz SLR generations

Batteries change from one generation to the next. When two share a year, the body style — or simply the plate — settles it.

| Generation | Years | Body | Batteries | URL |
|---|---|---|---|---|
| Slr Roadster | 2006–2025 | cabrio | 6 | /gb/car-batteries/mercedes-benz/slr-roadster-r199 |
| Slr | 2004–2025 | berlina | 6 | /gb/car-batteries/mercedes-benz/slr-r199 |

## Best-selling batteries for the Mercedes-Benz SLR

| Modelo | V | Ah | CCA (EN) | Tech | € VAT incl. | Stock | URL |
|---|---|---|---|---|---|---|---|
| Start-Stop battery Varta A7 12V 70Ah 760A AGM | 12 | 70 | 760 | AGM | 134,95 | ✓ | https://baterias.com/gb/battery-varta-a7-agm-12v-70ah-760a |
| Start-Stop battery Varta A5 12V 95Ah 850A AGM | 12 | 95 | 850 | AGM | 179,99 | ✓ | https://baterias.com/gb/battery-varta-a5-agm-12v-95ah-850a |
| Car battery Varta AUX14 12V 13Ah 200A | 12 | 13 | 200 | AGM | 70,20 | ✓ | https://baterias.com/gb/battery-varta-aux14-12v-13ah-200a |
| Car battery Varta AUX1 12V 35Ah 520A | 12 | 35 | 520 | PLOMO/ACIDO | 147,50 | ✓ | https://baterias.com/gb/battery-varta-aux1-12v-35ah-520a |

## How to know which battery your Mercedes-Benz SLR takes

Easiest of all is the number plate lookup: those few characters tell us the precise variant, the engine and the original battery, so you need not check anything else.

Another route is the vehicle paperwork: the registration date places you in one of the generations listed. In the overlap years, body style is the detail that separates them.

As a final check, look at the battery currently fitted: the label shows capacity (Ah) and cold cranking amps (A). Always replace with equal or higher figures, never lower, and keep the same dimensions and terminal layout.

## Start-Stop: which battery your SLR needs

The later SLR generations run Start-Stop, which puts the battery through hundreds of micro-cycles a day. These cars require EFB (basic Start-Stop) or AGM (Start-Stop with regenerative braking): fitting a conventional battery instead cuts service life to a few months and the ECU may disable the function. Rule of thumb: never downgrade from the technology fitted at the factory.

## Frequently asked questions

### Which battery does a Mercedes-Benz SLR take?
It depends on the generation and engine: there are 4 compatible batteries in total, from 13 to 95 Ah and 200 to 850 A of cold cranking. The best sellers for this model are Start-Stop battery Varta A7 12V 70Ah 760A AGM, Start-Stop battery Varta A5 12V 95Ah 850A AGM, Car battery Varta AUX14 12V 13Ah 200A. With your plate we tell you the exact one in seconds.

### How much does a Mercedes-Benz SLR battery cost?
Between 70.20 € and 179.99 €, VAT included, depending on capacity and technology (AGM, lead-acid). Start-Stop versions (AGM or EFB) sit at the top of the range because they withstand many more cycles.

### How do I know which generation my SLR is?
By the registration year: Slr Roadster (2006-2025); Slr (2004-2025). If your year falls in the overlap between two generations, tell them apart by body type (hatchback, estate or coupé) or use the plate finder, which settles it with no doubt.

### Can I fit a battery with more amps?
Yes, as long as the dimensions fit the tray and the terminal layout matches. More capacity (Ah) and more cold cranking (A) do not harm the vehicle: the alternator charges it the same and you gain margin in winter. What you must never do is go below the original figures.

### How long does a Mercedes-Benz SLR battery last?
Between 4 and 6 years in normal use. Start-Stop batteries (AGM/EFB) tend to last slightly less in city driving because of the number of starts, but they are designed for that cycling. If the car sits unused for weeks or you notice slow cranking in the cold, get it checked.

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Updated: 2026-10-29 · https://baterias.com/gb/car-batteries/mercedes-benz/slr