Retrofitting mobile communication systems
In general, it is necessary to get approval for the installation of mobile communication systems (car telephone, mobile phone, two-way radios, etc.) in a vehicle that received its type approval after 1st January, 1996.
Retroffited mobile phones and radios must have a type approval for this vehicle and be equipped with an e-mark.
Porsche has provided an approval for mobile phones and radios with a maximum transmitter power of 10 watts in the Driver's Manual of its vehicles. The installation instructions and recommendations contained there must be observed.
Porsche permits the installation and use of radio equipment over 10W for the communications services listed in the table under the following conditions:
- The transmitter power in the given frequency range must not exceed the stated Pmax values at the base of the aerial.
- Installation must be carried out expertly and a non-reflecting, adapted outer aerial must be employed.
- The manufacturer's operating and installation instructions for mobile phones, radios and aerials must be observed.
- Expertly installed mobile phones and radios do not adversely affect important vehicle systems such as ABS, airbag and Motronic. However, it is a prerequisite that there is no tampering in the installation and wiring of these systems. Parallel routing of wires to these systems and their wiring harnesses (particularly sensor wires) is not permitted.
| Band | Pmax/watts Cabriolet | Pmax/W Coupe Hardtop | Permitted aerial location |
|---|---|---|---|
| Shortwave up to 54 MHz | 10 (PEP) | 50 (PEP) | On outside of vehicle |
| 4m band | 10 (eff.) | 20 (eff.) | On outside of vehicle |
| 2m band | 10 (eff.) | 50 (eff.) | On outside of vehicle |
| 70cm | 10 (eff.) | 50 (eff.) | On outside of vehicle |
| 23cm | 10 (eff.) | 20 (eff.) | On outside of vehicle |
| C-Net | 10 (eff.) | 25 (eff.) | On outside of vehicle |
| D-Net | 10 (PEP) | 20 (PEP) | On outside of vehicle |
| E-Net | 10 (PEP) | 10 (PEP) | On outside of vehicle |
If a mobile phone or two-way radio is installed which does not conform to Porsche installation conditions, the general certification of the vehicle can be rendered null and void (EU EMV Vehicle regulation 95/54). In this case, a subsequent examination will be performed by Porsche EMC experts to ensure compliance with protective targets.
Radios only achieve their optimum range when an outside aerial is used. The use of mobile phones and radios without or with incorrectly installed outside aerials (or defective aerials) may give rise to excessive electromagnetic fields in the vehicle. In this case, the possibility of malfunctions in electronic vehicle systems and risks to health cannot be completely excluded.
In all cases, care must be taken in selecting the location of the aerial and to reduce the transmitter power if necessary, in order to ensure that the limit values of DIN VDE 0848 Part 2 (protection of persons in the frequency range from 30 kHz to 300 GHz) are complied with.