Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Model | Chassis code | Production time | Number built | Engine |
| --- | --- | --- | --- | --- |
| 300SEL | W109.015 | 09/65 - 12/67 | 2.369 | 3.0L M189 I6 |
| 300SEL | W109.016 | 12/67 - 01/70 | 2.519 | 2.8L M130 I6 |
| 300SEL 6.3 | W109.018 | 12/67 - 09/72 | 6.526 | 6.3L M100 V8 |
| 300SEL 3.5 | W109.056 | 08/69 - 09/72 | 9.483 | 3.5L M116 V8 |
| 300SEL 4.5 | W109.057 | 05/71 - 10/72 | 2.533 | 4.5L M117 V8 |
Question:
What model has a number built smaller than 6.526, and the Chassis code w109.015?
Answer:
300SEL